A week ago, I migrated our source control files from PVCS to Subversion (using the Ankh plugin for vs2005). I think its a good move, but not everyone in the team shares this opinion (although I have to say the majority of the team seem to agree with me).

We have a meeting this afternoon to decide if this is going to be a permanent switch.

Some unexpected things appear to have happened. It appears that a team member was able to update and check in an old revision of a file. I can see by looking at the history of the file that changes were made by team member A, then by member B. When member B checked in her changes, member A's changes were reverted. If we have any chance of retaining subversion I will need to find an answer as to why this happened. I've checked the event log on the server and have found some entries relating to the file.
Code:
Path '/trunk/DS2BOOKING/dsBookingQueries.vb' is already locked by user 'frankh' in filesystem 'C:/Base_SVN/automate/db'  [423, #160035]
[client 160.10.1.178]
Code:
Failed to create new lock.  [423, #160035]
[client 160.10.1.178]
Code:
Lock failed: newer version of '/trunk/DS2BOOKING/dsBookingQueries.vb' exists  [500, #160042]
[client 160.10.1.178]
Would it be possible that the team member was able to update an old version after stealing the lock? Is there any way to verify this?

Many thanks for your time