MariaDB-10.6.8 mariabackup --rsync option is error

[00] 2022-06-13 15:53:41 >> log scanned up to (241003218)

[00] 2022-06-13 15:53:41 Starting prep copy of non-InnoDB tables and files

[00] 2022-06-13 15:53:41 Skipping db: ./log

[00] 2022-06-13 15:53:41 Skipping db: ./log2

[00] 2022-06-13 15:53:41 Starting rsync as: rsync -t . --files-from=/app/mariadb10.6/tmp/xtrabackup_rsyncfiles_pass1 /app/backup/mariadb/FULL/2022-06-13_15-53-40/

rsync: link_stat "/app/mariadb10.6/data/app/mariadb10.6/data/ib_buffer_pool" failed: No such file or directory (2)

rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1179) [sender=3.1.2]

[00] 2022-06-13 15:53:41 rsync finished successfully.

[00] 2022-06-13 15:53:41 Finished a prep copy of non-InnoDB tables and files

[00] 2022-06-13 15:53:41 Acquiring BACKUP LOCKS...

[00] 2022-06-13 15:53:41 Starting to backup non-InnoDB tables and files

[00] 2022-06-13 15:53:41 Skipping db: ./log

[00] 2022-06-13 15:53:41 Skipping db: ./log2

[00] 2022-06-13 15:53:41 Starting rsync as: rsync -t . --files-from=/app/mariadb10.6/tmp/xtrabackup_rsyncfiles_pass2 /app/backup/mariadb/FULL/2022-06-13_15-53-40/

rsync: link_stat "/app/mariadb10.6/data/app/mariadb10.6/data/ib_buffer_pool" failed: No such file or directory (2)

rsync error: some files/attrs were not transferred (see previous errors) (code 23) at main.c(1179) [sender=3.1.2]

[00] 2022-06-13 15:53:41 Error: rsync failed with error code 1

mariabackup: Stopping log copying thread.[00] 2022-06-13 15:53:41 >> log scanned up to (241003218)