unreal froze after rebuilding lights and now i have a corrupt BuiltData file

super new to unreal and I have no idea how to recover from this issue. This is the error I get when I try to do a save all. Any help will be truly appreciated.

The asset ‘/Game/CaveRiver/Maps/justincase_BuiltData’ (justincase_BuiltData.uasset) failed to save.

Cancel: Stop saving all assets and return to the editor.
Retry: Attempt to save the asset again.
Continue: Skip saving this asset only



PS: I was lucky enough that i did a backup of all the files for that project last night so i did not lose too much but if there is any way to recover the current file that would be great. Thank you in advance.

if i delete the file, will unreal reconstruct it? or if i delete the file and bring in the backup , will unreal accept it? I don’t want to make things worse , and my deadline for the project is coming up soon, any help will be greatly appreciated, truly. thank you good samaritans :slight_smile: