I cannot I NEED help with this, please help a sister out

"An error occurred when deleting a message: message_ids must contain no more than 256 elements"

What does this mean and why cannot I continue my chat?? It's killing me, I haven't been able to use it and there's nothing that helps on here. I don't wanna start a new chat either😞😞

I plead and beg someone sees this and can actually help me