Change OOTB correlation rule in <device>/<correlation>/<rules>/<mac> as follows.
match_on_all = "defined:PrimarySourceMacAddresses, defined:Origins"
(CURRENT OOTB value)
match_on_all = defined:PrimarySourceMacAddresses
This OOTB value does not consider origin value, so incorrect device merging is happening
when 2 different devices in different origins having the same PrimaryMacAddress.
This will never be acceptable behavior in MSP (multi-tenancy)
Today's IT world, MacAddress is no longer unique.