Some maps suddenly crashed! #Crash #UE4-26

It has been working normally all the time (version 4.26). Last night, I got stuck when saving a map and then I just force exit. When I opened the map again today, it crashed. The following is a screenshot of the crash

At the same time, several maps with similar blueprints applied cannot be opened. I suspect it might be a problem with the blueprint? But how do I delete a blueprint with a problem when I can’t open the level?

Thank you!!!

UE4-26