ORA-01153: an incompatible media recovery is active
Cause: Attempted to start an incompatible media recovery or open resetlogsduring media recovery or RMAN backup . Media recovery sessions areincompatible if they attempt to recover the same file. Incomplete mediarecovery or open resetlogs is incompatible with any media recovery. Backup orrestore by RMAN is incompatible with open resetlogs Action: Complete or cancel the other media recovery session or RMAN backup
SQL> recover managed standby database cancel;
SQL> recover automatic standby database;
SQL> RECOVER MANAGED STANDBY DATABASE DISCONNECT FROM SESSION;
SQL> SELECT MESSAGE FROM V$DATAGUARD_STATUS;