Problem in node ‘Create Hypothesis Agent‘ This model is not supported in 2.2

Questions
1

I have been encountering this error message for several weeks now:

Problem in node ‘Create Hypothesis Agent’
This model is not supported in version 2.2 of the Agent node. Please upgrade the Agent node to the latest version.

I am currently using version 2.0.2.

When creating sub-agents that are connected to a main agent, this error message keeps appearing. I have tried many different approaches and eventually found a workaround, but this really needs to be handled differently. It cannot be the case that I have to apply this “trick” every single time to fix the issue. How can n8n provide a more user-friendly solution for this?

Context:

I have two n8n instances:

  • One for private use with a Basic subscription (Cloud hosted By N8N)

  • One for work with a Business subscription (Cloud hosted By N8N)

On my private account, I do not experience any issues. What I ended up doing was downloading the working workflow from my private instance and importing it into my Business subscription account after that, it works. However, this cannot be a sustainable solution, as this should not have to be done every time.

I have also read that many users are experiencing this issue. Support communication currently goes through AI, which is how I was directed here.

2

The issue stems from version mismatches in your AI Agent nodes. Since you’re on version 2.0.2, try this:

1. Delete the problematic “Create Hypothesis Agent” node

2. Add a fresh AI Agent node (it’ll use the latest version)

3. Reconfigure it with your same settings

The workaround you found (importing from another instance) confirms this is a version compatibility issue. For a permanent fix, consider upgrading your n8n instance to the latest version where these agent nodes have been standardized.

If that doesn’t resolve it, could you share whether you’re using any custom nodes or modified templates?