ORA-01531: a database already open by the instance
Cause: During ALTER DATABASE, an attempt was made to open a database on an instance for which there is already an open database.
Action: If you wish to open a new database on the instance, first shutdown the instance and then startup the instance and retry the operation.
Cause: During ALTER DATABASE, an attempt was made to open a database on an instance for which there is already an open database.
Action: If you wish to open a new database on the instance, first shutdown the instance and then startup the instance and retry the operation.
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