ORA-17628 RMAN-03009 duplicate target database for standby from active database

While run RMAN “duplicate target database for standby from active database nofilenamecheck” in 11g database, then got below errors:

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set newname for datafile 3 to "/u02/oradata/TESTDBSTY/undotbs01.dbf";
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channel ORA_DISK_1: starting datafile copy
input datafile file number=00003 name=/u02/oradata/TESTDB/undotbs01.dbf
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 01/15/2019 15:53:17
ORA-17628: Oracle error 19505 returned by remote Oracle server
continuing other job steps, job failed will not be re-run
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