Oracle RAC : CRS-4995: The command 'Delete resource' is invalid in crsctl. Use srvctl for this command

Issue :

$crsctl delete resource ora.RACTEST.db
CRS-4995: The command 'Delete resource' is invalid in crsctl. Use srvctl for this command.

Solution

Add “-unsupported” option to the command.  It should apply to “crsctl modify resource” as well.

Eg:
crsctl delete resource ora.RACTEST.db -unsupported