Why is datafile 1 in a LVL_0 not old enough?

I have a full LVL_0 backup of database and AL-backups taken same day. When restore is finished it complains about that my system file (datafile 1) is not old enough.

Can add that backup is from a RAC system and my database is single RAC

What have I done wrong?

Backup commands are

run

{

allocate channel c1 type disk;

allocate channel c2 type disk;

allocate channel c3 type disk;

allocate channel c4 type disk;

sql 'begin BACKUP_MGR.backup_mgmt.notify_backup_start; end ;';

sql 'alter system archive log current';

backup as compressed backupset section size 40000M database format '/ace/backup/omn_backup