Error xxx: database disk image is malformed

[djmallinson]

a couple of times recently i have seen these errors after adding linked adobe acrobat pdf files. the first occurs on opening the urd file and the second on compact/repair. Any advice gratefully received. So far the only fix has been to revert to a prior version
unfortunately the database is full of personal information which I can't share.
all the best David
1. Error loading pane: database disk image is malformed
2. Error repairing database: Attribute names must be unique (case-insensitive comparison)