I'm running the migration script to copy all the topics, users, etc. from our old ultimatebb board over to the new ubbthreads board. We have a *lot* of data to move. The script has been running for almost three hours now and it's probably just over half done.
Meanwhile our old board is still up and running, with new users registering and new posts and replies being created.
What happens if I run the migration script a second time? Is it smart enough to skip data already migrated? Will it create tons of duplicates? Will it refuse to run?
