The question posted is little complicated to answer as we do not know your complete environment.
All the VM backups are contained in the NSM database of the SCV appliance. All Virtual machine backup schedules are on SCV appliance.
All the SQL backups are contained in the NSM database of Snapcenter Server.
We assume that you have following setup
SCV Appliance --- Connected to --- SnapCenter Server A
SQL hosts -- connected to --- SnapCenter Server B
Now you would like to delete the SCV appliance from Snapcenter Server A and add it to Snapcenter Server B
Is that accurate?
If yes , you can do that. The reason being SCV appliance can exist by itself (just for VM backups) without SnapCenter server as the VM backups are no longer stored on Snapcenter server NSM database
(NSM -> Backend Mysql Database)
On the other hand if you have SQL databases on VMS and if you have SQL databases on RDM luns or VMDKS , the SCV appliance should be added to Snapcenter Server . All the Database related backups are stored in the NSM database of Snapcenter server
We recommend calling your account team or NetApp support hotline and provide us with more details to address your question