LR internal error SQL with metadata in library

When I want to sync meta data in the library, I had an error in the databse 

Besides of that, in some cases (not only those with multiple select and sync) I mention a label, a title or a description but then don't show up in the library. But LR has the data somewhere because he can filter on it and will provide it while exporting.

This bug is highly inconvenient when keywording and titeling large amounts of photo's (for AdobeStock or press agencies) since what you see on the screen is not what you get.

I checked the integrity of the catalogus: no problem found.

Here the label is blue but doesn't turn blue