Since VMware NSX 4.x, some services under MANAGER (proton) group, such as VMC_* are no longer in use, however stale leases for those deprecated services (from older versions like 3.x.x) are still present in 4.x.x since they were never deleted.
This issue was found during 4.1.2 testing and fix is present in 4.1.2 version. However, the fix is required in the "from" version during rolling-upgrade, so workaround needs to be applied in order to proceed with rolling-upgrade/maintenance mode.