Duplicate Ref IDs in RM 10

Reference Manager Reference Manager General
1

I have been using RM 10 for a month or so without any problems. Today, however, when I imported a reference it was assigned a Ref ID that was already in use. I now have two records with the Ref ID “1” but with different contents in the record [author, title, etc]. I thought this was impossible, and am wondering what might explain it.

Background that may/may not be relevant:

  • A colleague and I share the database, each adding/deleting references
  • She is upgrading to RM 12, or has already done so, and has opened the shared DB in RM12
  • The DB was backed up before the upgrade to RM12
  • She has not added/deleted any records since the upgrade to RM12

Any ideas, suggestions welcome.

Thanks. Jim