ORA-01153: an incompatible media recovery is active

admin

ORA-01153: an incompatible media recovery is active
Cause: Attempted to start an incompatible media recovery or open resetlogs
during media recovery or RMAN backup . Media recovery sessions are
incompatible if they attempt to recover the same data file. Incomplete media
recovery or open resetlogs is incompatible with any media recovery. Backup or
restore by RMAN is incompatible with open resetlogs
Action: Complete or cancel the other media recovery session or RMAN backup