Oracle Message ORA-25528 - too many candidate MTTRs are specified in _DB_MTTR_SIM_TARGET

ERRORtoo many candidate MTTRs are specified in _DB_MTTR_SIM_TARGET
CAUSEToo many candidate MTTRs are specified in _DB_MTTR_SIM_TARGET.
ACTIONAlter the value of _DB_MTTR_SIM_TARGET.