Cannot save Entity : file patch length limit exceeded (308/255) . You should shorten the name and try again

I’m not sure what you’re doing to receive this message or, indeed, where you received it. Follow the advice here to save me having to guess:

But here’s my guess IF YOU ARE ON WINDOWS: Windows has a built in MAX_PATH length set to 260 characters. Note: Windows 10 was supposed to remove this restriction, but I don’t know if that ever happened.