[GeoNetwork-users] Geonetwork cross harvesting: UUID avoids duplication?

Hello,

I have a series of 6 geonetwork (geonetwork 2.10), hosting national datasets (all different) disseminated across the continent.
Is it ok to have each geonetwork harvesting the others?
I mean A harvests B, C, D, E and F
B harvests A, C, D, E, and F
C harvests A, B, D, E and F
etc...

I thought that thanks to UUID, the metadata should not be duplicated, each geonetwork should have only 1 copy of the meta-data of the other geonetworks.
Is that correct, and does it actually work?

thanks!
Bruno