Sometimes you may need to move back and forward (activate) databases between the nodes many times in a short period of time. (For troubleshooting, testing or maintenance etc. purposes).
ou may wait until suppression is timed out. OR If you are sure that everything about the database, DAG and Exchange Cluster are OK then you can use the following command with SkipMoveSuppressionChecks parameter in Exchange Management shell to move (activate) the database on the Exchange DAG node:
Move-ActiveMailboxDatabase -Identity DB01 -SkipMoveSuppressionChecks -ActivateOnServer ExcOther