RMAN-04022: target database mount id % does not match channel's mount id %

Symptom:

  When we run rman target / and run  "crosscheck archivelog all", we hit an error

RMAN-04022: target database mount id ****  does not match channel's mount id ***

Solution:

   It is quite possible the DB is duplicated with rman. The default channel is still on the old one which is not the current DB. To specifically allocate a disk channel to fix it

run

{

allocate channel disk1 device type disk;

crosscheck archivelog all;

}