How to troubleshoot Exchange Server SP1 Add or remove a copy of a database

If the Exchange Server SP1 in your environment was upgraded from Exchange RTM or Exchange SP1 Beta, The following error may be encountered when you perform a delete copy of the database and add a copy of the database in EMC or execute remove-mailboxdatabasecopy or add-mailboxdatabasecopy commands in the EMS.

You may experience the following error message when you delete a copy of a database:

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While deleting a copy of a database prompts for the error above, but does not affect the results of execution, when you query the state of the database in EMC or EMS, you will find that the previously deleted DB1 copy does not already exist on the MAILBOX1 server: