RMAN-12012: multiple records for DISK parallelism found in catalog

Error:

While running RMAN backup getting below error.

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-12010: automatic channel allocation initialization failed
RMAN-12012: multiple records for DISK parallelism found in catalog

Solution:

Connect to sqlplus as sysdba and run below

 exec dbms_backup_restore.resetconfig;

Re-run Rman backup