UE5 Crash On Start Up

Hi, Today i were trying to code something(on blueprints) in my project but when i suddenly changed the variable type and project autosaved(variable was connected to a lot of pins) my ue 5.2 project crashed when i pressed compile button and it don’t want to open more. Can someome tell me what excatly i need to do? And is there some sort of backups in ue?