ovirt-log-collector appears some warning

INFO: Gathering oVirt Engine information...
INFO: Gathering PostgreSQL the oVirt Engine database and log files from localhost...
About to collect information from 2 hypervisors. Continue? (Y/n): 
INFO: Data center 'NCMHDC1' volume chains to be collected by '10.61.151.141'
INFO: Gathering information from selected hypervisors...
INFO: collecting information from 10.61.151.142
INFO: collecting information from 10.61.151.141
WARNING: Host '10.61.151.141' sosreport does not support option vdsm.dump-volume-chains