If your 'accounts.1391' is in /home/e-smith/db, then it has to be a work file left behind by something that was operating on the 'accounts' db.
diff accounts accounts.1391 should tell you what's different.
I can't imagine any of the SME templates or other systems accessing a database named 'accounts.1391', so the file is probably completely safe to delete.
If you want to be ultra-cautious, you could
- move 'accounts.1391' into another folder
- issue signal-event post-upgrade; signal-event reboot
If everything seems to work, delete the erroneous file.