Master / Backup reversed after upgrade to 2.0.1

[rhammond]

After performing an upgrade last week from 1.2.3 to 2.0.1 it appears that what used to be our secondary or backup firewall is now our primary. I updated the secondary first after disabling CARP.
We do have a dedicated CARP interface.

Is there an easy way to switch their roles back to what they were?

The automatic failover seems to be working, but I don't know if it's a stateful failover.