Uwe Disch

I have already tried a repair, but result is empty. I have already tried using KeePass 2.46.

Yes, all options tried: other software (KeeWeb), with/without key file and so on ...

The only idea left I have is this, that we have some kind of race condition (or the like) within source code and with the setup until February 17th we had luck in opening the files via SMB (result A). And now with SMB Signing enabled we get the same results like opening the files from local disk (result B). And I have also testet, that before February 17th (by setting the clock to February 6th) we were not able to open the files from local disk (result B). Any comments?

Yes, I checked with diff. Right now I retrieved both files from the backup again, zipped them on the server where the home shares resides and copied the zip file from the SMB share (see this comment: https://sourceforge.net/p/keepass/discussion/329221/thread/d0270674ee/#bc5d ). Exactly the same contents. Files can not ben opened. I also changed clock of PC back to February 6th and tried to open the files. No luck! And password is also the same since long time. What's going on?

The key was generated by KeePass in 2019 and never changed and is also a know good copy.

Yes, i've done so. https://sourceforge.net/p/keepass/discussion/329221/thread/d0270674ee/#823e/8fcc

Same problem, no access.

Hmmm? Are you joking? Passing all my credentials to an online service? Not possible from policies.