Bug 517863

Summary: Batch queue-subtract time errors
Product: [Applications] digikam Reporter: cask.r.aft19
Component: Plugin-Generic-TimeAdjustAssignee: Digikam Developers <digikam-bugs-null>
Status: RESOLVED FIXED    
Severity: normal CC: caulier.gilles, metzpinguin
Priority: NOR    
Version First Reported In: 9.0.0   
Target Milestone: ---   
Platform: Mint (Ubuntu based)   
OS: Linux   
Latest Commit: Version Fixed/Implemented In: 9.1.0
Sentry Crash Report:

Description cask.r.aft19 2026-03-19 21:01:33 UTC 
Using the Subtract Time part of Timestamp Adjustment causes 2 errors: 

1) the time is added instead of subtracted in the new file, and
2) the timestamp of many (but not all for some reason) of the original files are changed. In my case, photos from 2016 now say 2021. I can't find a way to undo this-thankfully I have backups. 

I will be updating to the newest version and trying again, will update this report after

This has happened twice, when trying to subtract 3 hrs from my photos (2493 items). No issue when adding 3 hrs. Will do more experiments if updating to the newest version does not help and will update the thread.
Comment 1 Maik Qualmann 2026-03-20 05:11:55 UTC 
Fixed with Bug 515679

Maik
Comment 2 Maik Qualmann 2026-03-20 05:18:06 UTC 
One more question: do you use the Time Adjust Tool within BQM or the standalone tool outside of it?

In BQM, Time Adjust must always be used as the last tool; otherwise, date changes by other tools in the queue are possible.

Maik