So my worries about recreation stop at half work are reality…
Today my server stop the process for a power failure…
Trying to start a repair give error…
What can I do?
Apparently my guess above was wrong and you will indeed have to start over. 
My convenience is to start over with a new job for the 4tb film backup…and doing a database backup every time i manually complete the job for fix the db…
Unfortunately yes… The recreate is not clever enough to figure out it could just continue.
Sad but true… and this time I got way behind 
I resolved re-starting the backup from scratch…
and doing a backup of all my db every day…
I do the same thing! A “DB’s backup” right after the backup runs…