Oracle Solution for Error ora-01153

ORA-01153: an incompatible media recovery is active

What triggered the Error:

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

What should we do to fix it:

Complete or cancel the other media recovery session or RMAN backup