Oracle Error ORA-15150: instance lock mode ‘string’ conflicts with other ASM instance(s)

Oracle Error Message

ORA-15150: instance lock mode ‘string’ conflicts with other ASM instance(s)

Reason for the Error

Some other ASM instance used the lock name space in a conflicting mode.

Solution

Shut down the other instance or start up in compatible mode. Alternatively, set the DB_UNIQUE_NAME initialization parameter to avoid the conflict.