Error with clientMessages validation - persists across all assistants

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
Snimka_obrazovky_2025-10-29_o_11.37.46.png
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