ORA-39710: only connect AS SYSDBA is allowed when OPEN in UPGRADE mode
Cause: An attempt was made to connect to a database when the database was OPEN for UPGRADE or DOWNGRADE.
Action: Try to connect again after the database upgrade or downgrade is complete.
Cause: An attempt was made to connect to a database when the database was OPEN for UPGRADE or DOWNGRADE.
Action: Try to connect again after the database upgrade or downgrade is complete.
