Just discovered that by ‘mistake’ when checking if Stable was on par with Testing currently, here is what popped:
[omano@omano-nvme ~]$ mbn versions --testing --stable -v
:: Compare versions stable / testing
linux515-rt-nvidia 510.60.02-2 510.60.02-1 1
:: 13445 packages
It was weird, Stable had this package on a higher revision. I then went to the Branch compare website, and I found this Manjaro - Branch Compare
[omano@omano-nvme ~]$ mbn duplicates --stable
:: Branch: stable
linux515-rt-nvidia 510.60.02-1 (extra)
linux515-rt-nvidia 510.60.02-2 (community)
[omano@omano-nvme ~]$ mbn duplicates --testing
:: Branch: testing
linux515-rt-nvidia 510.60.02-1 (extra)
linux515-rt-nvidia 510.60.02-2 (community)
[omano@omano-nvme ~]$ mbn duplicates --unstable
:: Branch: unstable
linux515-rt-nvidia 510.60.02-1 (extra)
linux515-rt-nvidia 510.60.02-2 (community)
Duplicate package, in extra and community repositories.
//EDIT: I guess the one in Extra should be removed, right?