It’s not sync, it’s you’re instance’s lemmy version. The stable release doesn’t include it yet. They’re on a release client for 0.19 which should officially launch soon.
This is partially why I keep my profile pretty baren. No display name, picture, bio, etc.
Edit: I don’t usually do this but I’m too curious, why would someone downvote this? You want me to be more attention grabbing? Oh, never mind, they hit everyone.