JIra “Assignee parameter’s value is invalid” & “Status parameter’s value is invalid” when setting conditional fields from Zendesk in n8n

Questions
1

I’m building a workflow that creates Jira tickets from Zendesk data.

Scenario:

  • If I only set the description (pulled from Zendesk) and other basic fields, the Jira ticket is created successfully.

  • The problem occurs when I add conditional logic to set both the assignee and a custom field based on a specific Zendesk ticket field value.

  • Additionally, after creating the ticket, I want to update its status in a separate Jira node — but this also fails when conditions are applied.

Flow:

  1. Zendesk Trigger → Retrieve ticket data.

  2. Jira node → Create issue.

    • Check the Zendesk ticket field value.

    • If matched, set assignee = Jira accountId and set a specific custom field value.

    • If not matched, leave assignee and custom field unset.

  3. Jira node (Update Issue) → Change the ticket status (e.g., from “To Do” to “In Progress”).

Expected:

  • If the condition is matched, assign the ticket, set the custom field, then update status in Jira.

  • If the condition is not matched, just create the ticket without those fields, and still update status.

Actual results:

  • Create Issue node error: ERROR: Assignee parameter’s value is invalid. This is likely because the URL entered is incorrect.

  • Update Issue node error: ERROR: Status parameter’s value is invalid. This is likely because the URL entered is incorrect.

Note:
The status update fails only in cases where the ticket creation step includes conditional assignee and custom field mapping. If those conditions are removed, Create step work fine.

Question:

  • How should I structure the Jira node output so that Jira only receives assignee, custom field, and status update parameters when they’re valid?

  • Is there a recommended way in n8n to skip empty/undefined fields before sending to Jira to avoid these validation errors?

Attached is the workflow I built where I encountered the issue.

Thanks in advance for your help!

2

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