Hi VAPI Support Team, I'm experiencing a persistent error that I cannot resolve: Error Message: assistantOverrides.each value in clientMessages must be one of the following values: conversation-update, function-call, function-call-result, hang, language-changed, metadata, model-output, speech-update, status-update, transcript, tool-calls, tool-calls-result, tool.completed, transfer-update, user-interrupted, voice-input, workflow.node.started The Problem: This error appears even with brand new assistants created from scratch Outbound calls via Make.com API works fine Testing in VAPI Dashboard fails with this error https://cdn.discordapp.com/attachments/1433042407494127627/1433042407691128863/Snimka_obrazovky_2025-10-29_o_11.37.46.png?ex=6903403e&is=6901eebe&hm=57315b32fb347be09a9af069f176653d557a91ee8bdc97f8942c85ba785deac2&

Thank you for sharing the error details. To help diagnose the issue, could you please share the exact

clientMessages

array or values you are setting in your assistantOverrides when testing in the VAPI Dashboard? This will help identify if any unsupported values are present. Source: - [Vapi API Reference Assistants](https://docs.vapi.ai/api-reference/assistants/get?explorer=true)

Hi, Thank you for the quick response! UPDATE: I've resolved the issue! The problem was indeed with the Phone Number configuration, not the assistant. What I did: Created a new test phone number in VAPI Dashboard Testing now works perfectly ✅ Conclusion: The original Phone Number (5c386efa-9e9c-44ad-ad84-095fefbe5f6e) had some corrupted assistantOverrides or clientMessages configuration that was invisible in the UI but was being applied during testing.

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