SQL server is blank while adding Additional Management Server in SCOM 2012 R2

SQL server is blank while adding Additional Management Server in SCOM 2012 R2

• I faced a weird issue today. As i was trying to add additional SCOM management Server , The SQL page where we select the OperationsManger DB was blank.
• After some investigation i found that the Management Server was already showing in the SCOM Management server view as Unmonitored.
• On i deleted it and tried again it worked and was able to see the OperationsManager DB