Error message when transfering photos to tropy

I received this message when trying to import my photos from my photos app on my mac into tropy. 'Failed to import item" “ERROR: SQLITE_BUSY: database is locked”. Any tips? Some of my photos transferred in but not all.

There are various scenarios where this error can occur; sometimes it’s not something to be worried about, but if this is reproducible or happens frequently, we should try to figure out the exact cause. If you could answer some of the following questions it would be helpful: Does this error occur frequently or only during that one import? How many photos were you importing at the time? If you import the photos that failed a second time, does the error occur again? And more generally, is your project saved on the main hard drive or elsewhere (external drive, network share, thumbdrive, etc.)? Thanks!