Error 27506 when reinstalling the offline audit server during a server migration -

The reason why this is failing is because a database with the same name already exists. Please change the name of the database that it's trying to install to OfflineAuditTempDB2.

Once the installer has ran, you can delete this new database and update the config file (located in folder C:\inetpub\wwwroot\QPulse5OfflineAuditServer) to point to your existing database.