Lost all data in docker after update

So I did an update to 2023.5.0 yesterday and now I am missing ALL historic sensor data, including energy.

I’m running it in docker on Synology and did it as usual which worked several times: Download the new image - Stop the instance - Reset - Start it again.h
tI do make backups of the file folders but those do not contain the db …

Any idea why how I could restore that?