READONLYNOBG, Read-only cannot be enabled on non-MM databases
MUPIP Error: This indicates an attempt to change a BG database to -READ_ONLY or to change a -READ_ONLY to MM access method; -READ_ONLY only compatible with the MM access mode.
Action: Verify whether the database should not be read only and adjust, if appropriate. Alternatively, set the database to MM access mode then mark it as read-only.
