MAN-06004: ORACLE error from recovery catalog database: RMAN-20035: invalid high RECID

We have a database A, we run <alter database begin backup;>  then flashcopy the whole database A to other server B, then we run <alter database end backup;>

On server B, we do rman cold backup on database A. Sometimes the cold backup is working, sometimes it is not, we get the error message invalid high RECID fpr not working, Any idea?

Here is our rman cold backup

connect $TARGET_CONNECT_STR as sysdba
startup mount
exit

RUN {

ALLOCATE CHANNEL ch00 TYPE 'SBT_TAPE';
ALLOCATE CHANNEL ch01 TYPE 'SBT_TAPE';
ALLOCATE CHANNEL ch02 TYPE 'SBT_TAPE';
ALLOCATE CHANNEL ch03 TYPE 'SBT_TAPE';