Invalid message received: 1 validation error for ConversationalConfigDBModelagent.prompt Value e | ElevenLabs | Page 1

AI-generated Answer for trinhthiquynhanh

Diagnosis
Your agent config is setting a Reasoning effort value on a model that doesn’t expose that control. ElevenLabs docs note that only “some models support configurable reasoning effort levels (None, Low, Medium, High).” If you set this for an unsupported LLM, validation fails, producing the error you saw. (elevenlabs.io)

Fix

Omit the Reasoning effort field for models that don’t support it. In practice: remove the reasoning-effort setting from conversation_config → agent → prompt (or from your dashboard’s Model settings). (elevenlabs.io)
If you do need to configure it, switch the agent to a model that supports Reasoning effort; then set it (recommended “None” for live conversational use). (elevenlabs.io)
If your code or tooling requires a value, use the “none” option added to LLMReasoningEffort; if the model still doesn’t support the control, you must omit the field entirely. (elevenlabs.io)

Notes

Reasoning effort is distinct from Thinking budget; the latter can be used independently to control internal reasoning tokens. Don’t assume support for one implies support for the other. (elevenlabs.io)

Reference on where this lives in config
The path agent.prompt (shown in your error) is the prompt section of the agent configuration/overrides, where such settings are typically supplied. Ensure no reasoning-effort setting is present there unless the chosen LLM supports it. (elevenlabs.io)

Related docs

Models: Reasoning effort (and guidance to keep it None for conversation). (elevenlabs.io)
Changelog: addition of “none” option to LLMReasoningEffort. (elevenlabs.io)

#Invalid message received: 1 validation error for ConversationalConfigDBModelagent.prompt Value e