Delete Lock for conversation 'idConversation' / Rasa

Hi everyone ! I am new on rasa dev platform. I am facing some experiences with rasa.core.lock_store.

On my website I am trying to integrate the rasa socket by following instructions. (Your Own Website). When I start a conversion , There is no answer. This is error message .

Have any people experienced such problems please ? Rasa version : 3.6.20

Best Regads,