How do I delete my chat history on a website? Where is it stored?

Hi Guru Team

The thing is, during testing, I sent messages from the website, and all that history is still stored there. However, after a while, messages stopped sending; they don’t even appear in the window. If I open the website in incognito mode, a new, blank chat opens, messages are sent, and a new thread is always created in Telegram.

I deleted and recreated the bot, but the website chat still stores the history of past correspondence, and new messages are no longer saved or sent.