Net with empty name

I got a net entry with an empty name. Anyone knows what it mean? Is that an issue?

I don’t think it is an issue, more a minor artifact.
KiCad PCB uses a dummy/placekeeper net 0, that has no name.
Seems this net, which strictly is in their list, is not suppressed in the rules menu.

Database example:

(net 0 "") (net 1 "Net-(J1-Pad3)") (net 2 "Net-(J1-Pad4)") (net 3 "Net-(J1-Pad5)")