Fix postgres unique constraint exception

[LoayGhreeb]

Attempt to fix #12167.

I cannot reproduce the issue on my machine, but I guess it may be related to background threads and quickly updating the entry.
One possible scenario is that the user is updating the field quickly, and updating the field is a critical section that should be completed as an atomic operation without interruptions.

updateEntry(BibEntry entry, Field field) {
	removeField(entry, field);
	insertField(entry, field);
}

The issue might occur if the first thread removes the field, but before it inserts the field again, another thread updates the same entry and also removes the field. This could result in both threads attempting to insert the same field into the table twice, violating the primary key constraint (entryId, fieldName), which must be unique.

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• I own the copyright of the code submitted and I licence it under the MIT license
• Change in CHANGELOG.md described in a way that is understandable for the average user (if change is visible to the user)
• Tests created for changes (if applicable)
• Manually tested changed features in running JabRef (always required)
• Screenshots added in PR description (for UI changes)
• Checked developer's documentation: Is the information available and up to date? If not, I outlined it in this pull request.
• Checked documentation: Is the information available and up to date? If not, I created an issue at https://github.com/JabRef/user-documentation/issues or, even better, I submitted a pull request to the documentation repository.

[LoayGhreeb]

@ytzemih, can you test the build of this PR and check if it resolves the issue? I cannot reproduce the issue on my machine, so it's a bit difficult to debug or see the results.

[ytzemih]

@LoayGhreeb Thanks for the candidate fix. Would you be able to rebuild the .deb in order for the new deb config to be applied? See #12370
Then, I'm happy to try it out. Thanks a lot.

[LoayGhreeb]

Would you be able to rebuild the .deb in order for the new deb config to be applied? See #12370

Alright, I just updated the branch. The build will be available in 10 minutes.

[ytzemih]

@LoayGhreeb Thanks for trying. For some reason, #12370 is still not fixed for my Linux. I can't install JR and I'm not keen on starting to backport/fiddle around with incompatible ALSA libraries. I hope, @Siedlerchr and I can figure that out soon and then I'll try again.

[github-actions]

The build of this PR is available at https://builds.jabref.org/pull/12373/merge.

[Siedlerchr]

@ytzemih there were missing a few lines in the yaml that needed to be adapted so no new build was produced. Should work now with build date 12.01.2025