N8n running 2 times instead of 1

Questions
1

Hey everyone, I’m facing a strange issue with my n8n workflow and I’d like to know if anyone has seen something similar.

I’m using a Webhook node that receives events from Plane (a project/task management tool).
Whenever a task is created, updated, or commented, Plane sends a webhook to my n8n workflow.

Inside the workflow:

  • I check what type of event it is (comment, creation, etc).

  • I query my MySQL database to check if that task already exists.

  • If it doesn’t, I create a thread on Discord and insert the task info into the database.

The problem:
Even though the workflow shows only 1 item in the output of every node, the workflow:

  • Creates 2 identical Discord threads, and

  • Inserts 2 identical rows in MySQL (only the thread_id differs).

Things I’ve already checked:

  • Webhook is set to Respond: Immediately.

  • No duplicated connections or extra branches in the workflow.

  • Plane is sending only one webhook (confirmed in logs).

  • No retry or split nodes configured.

Yet it seems like n8n is somehow executing the same workflow twice in parallel, even though only one item shows in the run data.

Has anyone experienced this behavior before? Any ideas what might cause this kind of silent duplication?

Workflow

{
  "name": "Plane to Discord",
  "nodes": [
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "plane-to-discord",
        "options": {
          "rawBody": false
        }
      },
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2.1,
      "position": [-1376, 400],
      "id": "ea149c9f-a492-4273-8039-4775105b3e0e",
      "name": "Webhook",
      "webhookId": "<REDACTED>",
      "executeOnce": false,
      "alwaysOutputData": false
    },
    {
      "parameters": {
        "method": "POST",
        "url": "https://discord.com/api/webhooks/<REDACTED>?wait=true",
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={ ... }",
        "options": {}
      },
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [-432, 688],
      "id": "899ac229-c0aa-4f2d-9d8c-7ee20b8ff7b0",
      "name": "Create Thread",
      "executeOnce": true
    },
    {
      "parameters": {
        "method": "PATCH",
        "url": "=https://discord.com/api/webhooks/<REDACTED>/messages/{{ $json.discord_first_message_id }}?thread_id={{ $json.discord_thread_id }}",
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={ ... }",
        "options": {}
      },
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [-432, 320],
      "id": "85f6534f-d06b-419c-97b3-07840276b302",
      "name": "Update Thread",
      "executeOnce": true
    },
    {
      "parameters": {
        "method": "POST",
        "url": "=https://discord.com/api/webhooks/<REDACTED>?thread_id={{ $json.discord_thread_id }}",
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={ ... }",
        "options": {}
      },
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [-704, 304],
      "id": "6099c337-348a-4ea3-92c6-05b0a3dd17cf",
      "name": "Add Comment",
      "executeOnce": true
    },
    {
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "typeValidation": "strict",
            "version": 2
          },
          "conditions": [
            {
              "leftValue": "={{ $json.sequence_id }}",
              "operator": { "type": "number", "operation": "exists" }
            }
          ],
          "combinator": "or"
        }
      },
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "position": [-704, 496],
      "id": "6d1991f2-1dfb-4e77-953e-014895b8ca86",
      "name": "Exist in DB?",
      "executeOnce": true
    },
    {
      "parameters": {
        "table": "issue_threads",
        "dataMode": "defineBelow",
        "valuesToSend": {
          "values": [
            { "column": "issue_id", "value": "={{ $('Webhook').item.json.body.data.id }}" },
            { "column": "project_id", "value": "={{ $('Webhook').item.json.body.data.project }}" },
            { "column": "discord_thread_id", "value": "={{ $json.channel_id }}" },
            { "column": "discord_first_message_id", "value": "={{ $json.id }}" },
            { "column": "sequence_id", "value": "={{ $('Webhook').item.json.body.data.sequence_id }}" }
          ]
        }
      },
      "type": "n8n-nodes-base.mySql",
      "typeVersion": 2.5,
      "position": [-208, 688],
      "id": "829d69e4-f13d-46f7-b588-fb91128f836e",
      "name": "Insert rows in a table",
      "executeOnce": true,
      "alwaysOutputData": true,
      "credentials": {
        "mySql": { "id": "<REDACTED>", "name": "<REDACTED>" }
      }
    },
    {
      "parameters": {
        "operation": "select",
        "table": "issue_threads",
        "limit": 1,
        "where": { "values": [{ "column": "issue_id", "value": "={{ $json.body.data.issue }}" }] }
      },
      "type": "n8n-nodes-base.mySql",
      "typeVersion": 2.5,
      "position": [-928, 304],
      "id": "a1efd0b4-7ae4-4e3a-abee-599ad83fbcee",
      "name": "Find Thread",
      "executeOnce": true,
      "alwaysOutputData": true,
      "credentials": {
        "mySql": { "id": "<REDACTED>", "name": "<REDACTED>" }
      }
    },
    {
      "parameters": {
        "operation": "select",
        "table": "issue_threads",
        "limit": 1,
        "where": { "values": [{ "column": "sequence_id", "value": "={{ $json.body.data.sequence_id }}" }] }
      },
      "type": "n8n-nodes-base.mySql",
      "typeVersion": 2.5,
      "position": [-928, 496],
      "id": "53496686-8f9f-4ca4-9672-2ef8dd4cf36c",
      "name": "Verify Thread",
      "executeOnce": true,
      "alwaysOutputData": true,
      "credentials": {
        "mySql": { "id": "<REDACTED>", "name": "<REDACTED>" }
      }
    },
    {
      "parameters": {
        "conditions": {
          "options": { "caseSensitive": true, "typeValidation": "strict", "version": 2 },
          "conditions": [
            {
              "leftValue": "={{ $json.body.event }}",
              "rightValue": "issue_comment",
              "operator": { "type": "string", "operation": "equals" }
            }
          ],
          "combinator": "and"
        }
      },
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "position": [-1152, 400],
      "id": "2b3a908d-eae8-445e-98bd-a12f3ea6bd21",
      "name": "is Comment?",
      "executeOnce": true
    }
  ],
  "connections": {
    "Webhook": { "main": [[{ "node": "is Comment?", "type": "main", "index": 0 }]] },
    "Create Thread": { "main": [[{ "node": "Insert rows in a table", "type": "main", "index": 0 }]] },
    "Exist in DB?": {
      "main": [
        [{ "node": "Update Thread", "type": "main", "index": 0 }],
        [{ "node": "Create Thread", "type": "main", "index": 0 }]
      ]
    },
    "Find Thread": { "main": [[{ "node": "Add Comment", "type": "main", "index": 0 }]] },
    "Verify Thread": { "main": [[{ "node": "Exist in DB?", "type": "main", "index": 0 }], []] },
    "is Comment?": {
      "main": [
        [{ "node": "Find Thread", "type": "main", "index": 0 }],
        [{ "node": "Verify Thread", "type": "main", "index": 0 }]
      ]
    }
  },
  "active": true,
  "settings": {
    "executionOrder": "v1",
    "timezone": "America/Sao_Paulo"
  },
  "versionId": "<REDACTED>",
  "meta": { "instanceId": "<REDACTED>" },
  "id": "FEwf8ESrIyaWOvNw",
  "tags": []
}

      },
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [-432, 688],
      "id": "899ac229-c0aa-4f2d-9d8c-7ee20b8ff7b0",
      "name": "Create Thread",
      "executeOnce": true
    },
    {
      "parameters": {
        "method": "PATCH",
        "url": "=https://discord.com/api/webhooks/<REDACTED>/messages/{{ $json.discord_first_message_id }}?thread_id={{ $json.discord_thread_id }}",
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={ ... }",
        "options": {}
      },
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [-432, 320],
      "id": "85f6534f-d06b-419c-97b3-07840276b302",
      "name": "Update Thread",
      "executeOnce": true
    },
    {
      "parameters": {
        "method": "POST",
        "url": "=https://discord.com/api/webhooks/<REDACTED>?thread_id={{ $json.discord_thread_id }}",
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={ ... }",
        "options": {}
      },
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [-704, 304],
      "id": "6099c337-348a-4ea3-92c6-05b0a3dd17cf",
      "name": "Add Comment",
      "executeOnce": true
    },
    {
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "typeValidation": "strict",
            "version": 2
          },
          "conditions": [
            {
              "leftValue": "={{ $json.sequence_id }}",
              "operator": { "type": "number", "operation": "exists" }
            }
          ],
          "combinator": "or"
        }
      },
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "position": [-704, 496],
      "id": "6d1991f2-1dfb-4e77-953e-014895b8ca86",
      "name": "Exist in DB?",
      "executeOnce": true
    },
    {
      "parameters": {
        "table": "issue_threads",
        "dataMode": "defineBelow",
        "valuesToSend": {
          "values": [
            { "column": "issue_id", "value": "={{ $('Webhook').item.json.body.data.id }}" },
            { "column": "project_id", "value": "={{ $('Webhook').item.json.body.data.project }}" },
            { "column": "discord_thread_id", "value": "={{ $json.channel_id }}" },
            { "column": "discord_first_message_id", "value": "={{ $json.id }}" },
            { "column": "sequence_id", "value": "={{ $('Webhook').item.json.body.data.sequence_id }}" }
          ]
        }
      },
      "type": "n8n-nodes-base.mySql",
      "typeVersion": 2.5,
      "position": [-208, 688],
      "id": "829d69e4-f13d-46f7-b588-fb91128f836e",
      "name": "Insert rows in a table",
      "executeOnce": true,
      "alwaysOutputData": true,
      "credentials": {
        "mySql": { "id": "<REDACTED>", "name": "<REDACTED>" }
      }
    },
    {
      "parameters": {
        "operation": "select",
        "table": "issue_threads",
        "limit": 1,
        "where": { "values": [{ "column": "issue_id", "value": "={{ $json.body.data.issue }}" }] }
      },
      "type": "n8n-nodes-base.mySql",
      "typeVersion": 2.5,
      "position": [-928, 304],
      "id": "a1efd0b4-7ae4-4e3a-abee-599ad83fbcee",
      "name": "Find Thread",
      "executeOnce": true,
      "alwaysOutputData": true,
      "credentials": {
        "mySql": { "id": "<REDACTED>", "name": "<REDACTED>" }
      }
    },
    {
      "parameters": {
        "operation": "select",
        "table": "issue_threads",
        "limit": 1,
        "where": { "values": [{ "column": "sequence_id", "value": "={{ $json.body.data.sequence_id }}" }] }
      },
      "type": "n8n-nodes-base.mySql",
      "typeVersion": 2.5,
      "position": [-928, 496],
      "id": "53496686-8f9f-4ca4-9672-2ef8dd4cf36c",
      "name": "Verify Thread",
      "executeOnce": true,
      "alwaysOutputData": true,
      "credentials": {
        "mySql": { "id": "<REDACTED>", "name": "<REDACTED>" }
      }
    },
    {
      "parameters": {
        "conditions": {
          "options": { "caseSensitive": true, "typeValidation": "strict", "version": 2 },
          "conditions": [
            {
              "leftValue": "={{ $json.body.event }}",
              "rightValue": "issue_comment",
              "operator": { "type": "string", "operation": "equals" }
            }
          ],
          "combinator": "and"
        }
      },
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "position": [-1152, 400],
      "id": "2b3a908d-eae8-445e-98bd-a12f3ea6bd21",
      "name": "is Comment?",
      "executeOnce": true
    }
  ],
  "connections": {
    "Webhook": { "main": [[{ "node": "is Comment?", "type": "main", "index": 0 }]] },
    "Create Thread": { "main": [[{ "node": "Insert rows in a table", "type": "main", "index": 0 }]] },
    "Exist in DB?": {
      "main": [
        [{ "node": "Update Thread", "type": "main", "index": 0 }],
        [{ "node": "Create Thread", "type": "main", "index": 0 }]
      ]
    },
    "Find Thread": { "main": [[{ "node": "Add Comment", "type": "main", "index": 0 }]] },
    "Verify Thread": { "main": [[{ "node": "Exist in DB?", "type": "main", "index": 0 }], []] },
    "is Comment?": {
      "main": [
        [{ "node": "Find Thread", "type": "main", "index": 0 }],
        [{ "node": "Verify Thread", "type": "main", "index": 0 }]
      ]
    }
  },
  "active": true,
  "settings": {
    "executionOrder": "v1",
    "timezone": "America/Sao_Paulo"
  },
  "versionId": "<REDACTED>",
  "meta": { "instanceId": "<REDACTED>" },
  "id": "FEwf8ESrIyaWOvNw",
  "tags": []
}

Output returned by the last node

image
image1246×543 54.3 KB

{
  "nodes": [
    {
      "parameters": {
        "httpMethod": "POST",
        "path": "plane-to-discord", 
        "options": {
          "rawBody": false
        }
      },
      "type": "n8n-nodes-base.webhook",
      "typeVersion": 2.1,
      "position": [-1376, 400],
      "id": "ea149c9f-a492-4273-8039-4775105b3e0e",
      "name": "Webhook",
      "webhookId": "<REDACTED_WEBHOOK_ID>",
      "executeOnce": false,
      "alwaysOutputData": false
    },
    {
      "parameters": {
        "method": "POST",
        "url": "https://discord.com/api/webhooks/<REDACTED_DISCORD_WEBHOOK>?wait=true",
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={\n  \"content\": \"🧩 Nova task criada no Plane por {{$('Webhook').item.json.body.activity.actor.display_name}}\",\n  \"thread_name\": \"WYZAR-{{$('Webhook').item.json.body.data.sequence_id}} · {{$('Webhook').item.json.body.data.name}}\",\n  \"embeds\": [\n    {\n      \"title\": \"{{$('Webhook').item.json.body.data.name}}\",\n      \"description\": \"{{$('Webhook').item.json.body.data.description_stripped || 'Sem descrição'}}\",\n      \"fields\": [\n        { \"name\": \"Status\", \"value\": \"{{$('Webhook').item.json.body.data.state.name}}\", \"inline\": true },\n        { \"name\": \"Prioridade\", \"value\": \"{{$('Webhook').item.json.body.data.priority}}\", \"inline\": true },\n        { \"name\": \"Início\", \"value\": \"{{$('Webhook').item.json.body.data.start_date || '—'}}\", \"inline\": true },\n        { \"name\": \"Entrega\", \"value\": \"{{$('Webhook').item.json.body.data.target_date || '—'}}\", \"inline\": true },\n        { \"name\": \"Responsáveis\", \"value\": \"{{( $('Webhook').item.json.body.data.assignees || [] ).map(a => a.display_name || ((a.first_name || '') + ' ' + (a.last_name || ''))).filter(Boolean).join(', ') || '—'}}\", \"inline\": false },\n        { \"name\": \"Labels\", \"value\": \"{{( $('Webhook').item.json.body.data.labels || [] ).map(l => l.name).join(', ') || '—'}}\", \"inline\": false }\n      ],\n      \"timestamp\": \"{{$('Webhook').item.json.body.data.created_at}}\"\n    }\n  ],\n  \"allowed_mentions\": { \"parse\": [] },\n  \"username\": \"Plane\"\n}\n",
        "options": {}
      },
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [-480, 592],
      "id": "899ac229-c0aa-4f2d-9d8c-7ee20b8ff7b0",
      "name": "Create Thread",
      "executeOnce": true,
      "alwaysOutputData": false
    },
    {
      "parameters": {
        "method": "PATCH",
        "url": "=https://discord.com/api/webhooks/<REDACTED_DISCORD_WEBHOOK>/messages/{{ $json.discord_first_message_id }}?thread_id={{ $json.discord_thread_id }}\n",
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={\n  \"content\": \"🧩 Task atualizada por {{ $('Webhook').item.json.body.activity.actor.display_name }}\",\n  \"embeds\": [\n    {\n      \"title\": \"{{ $('Webhook').item.json.body.activity.new_value }}\",\n      \"description\": \"{{ $('Webhook').item.json.body.data.description_stripped }}\",\n      \"fields\": [\n        { \"name\": \"Status\", \"value\": \"{{ $('Webhook').item.json.body.data.state.name }}\", \"inline\": true },\n        { \"name\": \"Prioridade\", \"value\": \"{{ $('Webhook').item.json.body.data.priority }}\", \"inline\": true },\n        { \"name\": \"Início\", \"value\": \"{{ $('Webhook').item.json.body.data.start_date }}\", \"inline\": true },\n        { \"name\": \"Entrega\", \"value\": \"{{ $('Webhook').item.json.body.data.target_date }}\", \"inline\": true },\n        { \"name\": \"Responsáveis\", \"value\": \"{{ ( ($('Webhook').item.json.body.data.assignees || []) .map(a => a.display_name || ((a.first_name || '') + ' ' + (a.last_name || ''))).filter(Boolean).join(', ') ) || '—' }}\", \"inline\": false},\n        { \"name\": \"Labels\", \"value\": \"{{ ( ($('Webhook').item.json.body.data.labels || []).map(l => l.name).join(', ') ) || '—' }}\", \"inline\": false}\n      ],\n      \"timestamp\": \"{{ $('Webhook').item.json.body.data.updated_at }}\"\n    }\n  ],\n  \"allowed_mentions\": { \"parse\": [] },\n  \"username\": \"{{ $('Webhook').item.json.body.activity.actor.display_name }}\"\n}\n",
        "options": {}
      },
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [-480, 400],
      "id": "85f6534f-d06b-419c-97b3-07840276b302",
      "name": "Update Thread",
      "executeOnce": true
    },
    {
      "parameters": {
        "method": "POST",
        "url": "=https://discord.com/api/webhooks/<REDACTED_DISCORD_WEBHOOK>?thread_id={{ $json.discord_thread_id }}",
        "sendBody": true,
        "specifyBody": "json",
        "jsonBody": "={\n  \"content\": \"{{ (() => { \n      const src = $('Webhook').item.json;\n      if (!(src.body?.event === 'issue_comment' && src.body?.action === 'created')) {\n        return '[evento não é comentário]';\n      }\n      const raw = src.body?.data?.comment_html || src.body?.activity?.new_value || '';\n      const text = raw\n        .replace(/<br\\s*\\/?>/gi, '\\\\n')\n        .replace(/<\\/p>\\s*<p/gi, '\\\\n<p')\n        .replace(/<[^>]*>/g, '')\n        .replace(/&nbsp;/gi, ' ')\n        .replace(/&amp;/gi, '&')\n        .replace(/&lt;/gi, '<')\n        .replace(/&gt;/gi, '>')\n        .trim();\n      return text || '[sem texto]';\n  })() }}\",\n  \"allowed_mentions\": { \"parse\": [] },\n  \"username\": \"{{ $('Webhook').item.json.body?.activity?.actor?.display_name || 'Plane' }}\"\n}\n",
        "options": {}
      },
      "type": "n8n-nodes-base.httpRequest",
      "typeVersion": 4.2,
      "position": [-704, 304],
      "id": "6099c337-348a-4ea3-92c6-05b0a3dd17cf",
      "name": "Add Comment",
      "executeOnce": true
    },
    {
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "typeValidation": "strict",
            "version": 2
          },
          "conditions": [
            {
              "id": "18d37090-acf0-49b3-a658-a8bd39401c97",
              "leftValue": "={{ $json.sequence_id }}",
              "rightValue": "",
              "operator": {
                "type": "number",
                "operation": "exists",
                "singleValue": true
              }
            }
          ],
          "combinator": "or"
        },
        "options": {}
      },
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "position": [-704, 496],
      "id": "6d1991f2-1dfb-4e77-953e-014895b8ca86",
      "name": "Exist in DB?",
      "executeOnce": true,
      "alwaysOutputData": false,
      "onError": "continueRegularOutput"
    },
    {
      "parameters": {
        "table": {
          "__rl": true,
          "value": "issue_threads",
          "mode": "list",
          "cachedResultName": "issue_threads"
        },
        "dataMode": "defineBelow",
        "valuesToSend": {
          "values": [
            { "column": "issue_id", "value": "={{ $('Webhook').item.json.body.data.id }}" },
            { "column": "project_id", "value": "={{ $('Webhook').item.json.body.data.project }}" },
            { "column": "discord_thread_id", "value": "={{ $json.channel_id }}" },
            { "column": "discord_first_message_id", "value": "={{ $json.id }}" },
            { "column": "sequence_id", "value": "={{ $('Webhook').item.json.body.data.sequence_id }}" }
          ]
        },
        "options": {}
      },
      "type": "n8n-nodes-base.mySql",
      "typeVersion": 2.5,
      "position": [-256, 592],
      "id": "829d69e4-f13d-46f7-b588-fb91128f836e",
      "name": "Insert rows in a table",
      "executeOnce": true,
      "alwaysOutputData": true,
      "credentials": {
        "mySql": {
          "id": "<REDACTED_MYSQL_CRED_ID>",
          "name": "<REDACTED_MYSQL_CRED_NAME>"
        }
      },
      "onError": "continueRegularOutput"
    },
    {
      "parameters": {
        "operation": "select",
        "table": {
          "__rl": true,
          "value": "issue_threads",
          "mode": "list",
          "cachedResultName": "issue_threads"
        },
        "limit": 1,
        "where": {
          "values": [
            { "column": "issue_id", "value": "={{ $json.body.data.issue }}" }
          ]
        },
        "options": {}
      },
      "type": "n8n-nodes-base.mySql",
      "typeVersion": 2.5,
      "position": [-928, 304],
      "id": "a1efd0b4-7ae4-4e3a-abee-599ad83fbcee",
      "name": "Find Thread",
      "executeOnce": true,
      "alwaysOutputData": true,
      "credentials": {
        "mySql": {
          "id": "<REDACTED_MYSQL_CRED_ID>",
          "name": "<REDACTED_MYSQL_CRED_NAME>"
        }
      },
      "onError": "continueRegularOutput"
    },
    {
      "parameters": {
        "operation": "select",
        "table": {
          "__rl": true,
          "value": "issue_threads",
          "mode": "list",
          "cachedResultName": "issue_threads"
        },
        "limit": 1,
        "where": {
          "values": [
            { "column": "sequence_id", "value": "={{ $json.body.data.sequence_id }}" }
          ]
        },
        "options": {}
      },
      "type": "n8n-nodes-base.mySql",
      "typeVersion": 2.5,
      "position": [-928, 496],
      "id": "53496686-8f9f-4ca4-9672-2ef8dd4cf36c",
      "name": "Verify Thread",
      "executeOnce": true,
      "alwaysOutputData": true,
      "notesInFlow": false,
      "retryOnFail": false,
      "credentials": {
        "mySql": {
          "id": "<REDACTED_MYSQL_CRED_ID>",
          "name": "<REDACTED_MYSQL_CRED_NAME>"
        }
      },
      "onError": "continueRegularOutput"
    },
    {
      "parameters": {
        "conditions": {
          "options": {
            "caseSensitive": true,
            "leftValue": "",
            "typeValidation": "strict",
            "version": 2
          },
          "conditions": [
            {
              "id": "570753cd-d3f2-4749-805d-06b50d427483",
              "leftValue": "={{ $json.body.event }}",
              "rightValue": "issue_comment",
              "operator": {
                "type": "string",
                "operation": "equals",
                "name": "filter.operator.equals"
              }
            }
          ],
          "combinator": "and"
        },
        "options": {}
      },
      "type": "n8n-nodes-base.if",
      "typeVersion": 2.2,
      "position": [-1152, 400],
      "id": "2b3a908d-eae8-445e-98bd-a12f3ea6bd21",
      "name": "is Comment?",
      "executeOnce": true
    }
  ],
  "connections": {
    "Webhook": { "main": [[{ "node": "is Comment?", "type": "main", "index": 0 }]] },
    "Create Thread": { "main": [[{ "node": "Insert rows in a table", "type": "main", "index": 0 }]] },
    "Add Comment": { "main": [[ ]] },
    "Exist in DB?": { "main": [[ ], [{ "node": "Create Thread", "type": "main", "index": 0 }]] },
    "Find Thread": { "main": [[{ "node": "Add Comment", "type": "main", "index": 0 }]] },
    "Verify Thread": { "main": [[{ "node": "Exist in DB?", "type": "main", "index": 0 }], []] },
    "is Comment?": {
      "main": [
        [{ "node": "Find Thread", "type": "main", "index": 0 }],
        [{ "node": "Verify Thread", "type": "main", "index": 0 }]
      ]
    }
  ],
  "pinData": {},
  "meta": { "instanceId": "<REDACTED_INSTANCE_ID>" }
}

Information

  • n8n version: 1.114.4
  • Database (default: SQLite): MySQL
  • Running n8n via (Docker, npm, n8n cloud, desktop app): EasyPanel (Docker)
  • Operating system: Linux
2

Hi @dunoxx,

Regarding your last executed node workflow chart it seems there is only 1 item which indicates that the webhook trigger was only executed once.

Is your n8n workflow received 2 separate webhook trigger and executing them in parallel?

Kind regards,

João Paixão

3

No, there are only 1 workflow working as you can see in the image

image
image1416×566 37.5 KB

Nothing works in parallel, that’s the issue, everything indicates working fine, but in the end, in my MySQL and Discord it’s duplicated.

4

Go to executions. Does it show it triggered twice close to each other?

5

image
image266×507 21.4 KB

Yes, looks like it’s executing 2 times close each other.

Is there anything i can do to avoid it? I’ve already change to execute ONCE and the problem persist.

6

i solved the problem.

The duplicate comes from Plane Webhook, it’s not inside N8N, i have to implemente new validations to deal with this duplication. Everything is working fine now!

Thanks.

3 Likes
7

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