See Oracle Support Note 13498382.8 and the bug text. Bug 13498382 - ORA-1122 ORA-1208 RMAN Duplicate overwrites datafiles at original location despite db_create_file_dest (Doc ID 13498382.8) Hemant K Chitale This email and any attachments are confidential and may also be privileged. If you are not the intended recipient, please delete all copies and notify the sender immediately. You may wish to refer to the incorporation details of Standard Chartered PLC, Standard Chartered Bank and their subsidiaries at https://www.sc.com/en/incorporation-details.html.