Please use the Check Database function, then sync again. - message

Please use the Check Database function, then sync again. If problems persist, please force a one-way sync in the preferences screen. keeps popping up, how do i fix this?

Can you tell us what you’re doing that leads to this?

Have you already run Tools > Check Database like it says to?

Then try everything on the Troubleshooting Checklist, including the things that you don’t think are relevant.

Yes i already ran tools → check database

And these things?

I don’t do anything i just press sync and it shows up as that

Pressing Sync is doing something. That’s what I needed to know.
Now do the Checklist.

I pressed sync it says check database i checked database it said everything is optimised then when i try to press sync it comes up with the message again and then i press one way sync do the one way sync and then when i try to sync again it comes back with the check database and do a one way sync again

Still need to do: