According documentation https://mariadb.com/kb/en/mariabackup-options/#-galera-info `--galera-info` option "If the server is not a Galera Cluster node, then this option has no effect."

however, this option causes incremental backup to fail:

++ sudo mariadb-backup --backup -utest_user -pct570c3521fCCR# --target-dir=backup1_2 --incremental-basedir=backup1 --galera-info
[00] 2022-10-28 10:37:37 Error: cannot open /home/vagrant/backup1//xtrabackup_checkpoints
[00] 2022-10-28 10:37:37 mariabackup: error: failed to read metadata from /home/vagrant/backup1//xtrabackup_checkpoints