XCP copy fails with reasion Files were modified deleted while copy was in progress

• ONTAP 9
• XCP NFS 1.9.4P1
• Live source

• The source volume was live，users were continuously accessing and modifying data on the volume
• XCP NFS has supported live sources since version 1.7
• The XCP copy operation failed while migrating a large volume from third-party storage to NetApp storage

XCP log:
2025-10-24 16:30:02,538 - INFO - 417081 xcp xcp Command: copy {-loglevel: 'debug', -newid: '202501024_copy'}
...
2025-11-01 01:15:16,389 - INFO - 417081 xcp xcp Unreadable dirs : 190, Unreadable files : 1280, Files modified while reading : 690, Files deleted while reading : 590, Total hardlinks of skipped files : 0
2025-11-01 01:15:16,390 - INFO - 417081 xcp xcp
Skipped summary : 690 files were being modified while reading and 590 files were deleted while reading

Reason for skipping :
* Files were modified/deleted while copy was in progress.
Corrective action : Since source data was modified during copy operation, run sync command for incremental changes.
Please check Job_202501024_copy_2025-10-24_16.30.02.250360_copy.log file to get details on skipped files.

2025-11-01 01:15:16,390 - INFO - 417081 xcp xcp 368 retries, 84064897 scanned, 84045217 copied, 18153 linked, 84064648 indexed, 121930 giants, 190 errors, 678 TiB in (1.09 GiB/s), 678 TiB out (1.09 GiB/s), 7d8h.
2025-11-01 01:15:16,390 - INFO - 417081 xcp xcp Command has failed