sorry by the delay. I had tons of messages to read (due to my inactivity last weeks). The error in your restore seems to be produced by an inconsistency in your sections and/or modules in the original course (OFFICE101-03) or in the destination (OFFICE101-03A) one.
Perhaps it only involves making some extra check in the restore process (if possible). In order to check this, could you send me privately the file that you are trying to restore and another backup file with the OFFICE101-03A complete? With this I'll be able to test your exact problem.
Ciao