Linux incremental file backup

UrBackup 2.4.13

Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal

i have 3 different linux machines with the same type errors in client log:

2021-11-27 08:30:49: ERROR: Creating shadowcopy of “.symlink_New_York” failed.
2021-11-27 08:30:50: ERROR: Creating shadowcopy of “.symlink_os-release” failed.
2021-11-27 08:30:50: ERROR: Creating shadowcopy of “.symlink_rmt-tar” failed.
2021-11-27 08:30:50: ERROR: Creating shadowcopy of “.symlink_aclocal-1.16” failed.
2021-11-27 08:30:50: ERROR: Creating shadowcopy of “.symlink_aclocal-1.16.1.gz” failed.
2021-11-27 08:30:50: ERROR: Creating shadowcopy of “.symlink_xtables-nft-multi” failed.
2021-11-27 08:30:50: ERROR: Creating shadowcopy of “.symlink_al” failed.
2021-11-27 08:30:50: ERROR: Creating shadowcopy of “.symlink_automake-1.16” failed.

there is hundreds of these messges in log …

i can see in the backup folder root for this 11/27 backup…files matching each “symlink_New_York”, “symlink_os-release”…for each message. This is consistent for each backup run…

i dont see any errors on server log…very little info there.

appears that the folders in my folder list are being backed…
/mnt/nas/nas/media/pictures pictures follow_symlinks,symlinks_optional,share_hashes
/etc etc follow_symlinks,symlinks_optional,share_hashes
/home home follow_symlinks,symlinks_optional,share_hashes
/root root follow_symlinks,symlinks_optional,share_hashes

also see, dont think it is related

2021-11-27 08:23:24: ERROR: Token id for user “systemd-timesync” not found
2021-11-27 08:23:24: ERROR: Token id for user “tss” not found
2021-11-27 08:23:24: ERROR: Token id for user “tcpdump” not found
2021-11-27 08:23:24: ERROR: Token id for user “_rpc” not found
2021-11-27 08:23:24: ERROR: Token id for user “systemd-coredump” not found
2021-11-27 08:23:24: ERROR: Token id for user “postfix” not found
2021-11-27 08:23:24: ERROR: Token id for user “usbmux” not found
2021-11-27 08:23:24: ERROR: Token id for user “urbackup” not found
2021-11-27 08:23:24: ERROR: Token id for group “daemon” not found

i understand these are not critical, and have to do with copying permissions…