STEAM Cloud warning?

Uhm, today when i was about to start GMod a small window appeared, telling me that my STEAM Cloud files wasn’t syncronised and that i could lose my Achievments… Help!
Im too afraid to start GMod right now, does anyone know a solution to this?

Nobody could care less about your achievments since they could be edited with an achievment manager.

Don’t worry about it, i’m pretty sure it means it’s just out of sync. Just restart steam if it’s bothering you that much.

Yeah, i restarted the comp and the Message didn’t show up when i launched GMod again.