Thank you @OttoKerner for your answer.
I am aware that the issue is likely due to my actions.
I am considering running the DBRepair reindex command, as I mentioned in this forum post:
Perhaps this could also address another issue I am experiencing.
Before proceeding, I would like to know if it is safe to stop the server to restore a backup. Will this have any adverse effects?
Thank you in advance for your help.
Best regards,
