[ovirt-users] When and how to change VDSM REVISION in multipath.conf

Hello, I created some hosts at time of 4.3.3 or similar and connecting to iSCSI I set this in multipath.conf to specify customization " # VDSM REVISION 1.5 # VDSM PRIVATE # This file is managed by vdsm. ... " Then I updated the environment gradually to 4.3.8 but of course the file remained the same because of its configuration and the "PRIVATE" label. Now I install new hosts in 4.3.8 and I see that by default they have these lines " # VDSM REVISION 1.8 # This file is managed by vdsm. " So the question is: suppose I customize the multipath.conf file using the "# VDSM PRIVATE" line, how do I have to manage the REVISION number as time goes on and I execute minor updates to hosts? What will it change between 1.5 above and 1.8? Any impact if I leave 1.5 for example across all my 4.3.8 hosts? Thanks in advance for clarification, Gianluca