Cant add more than 4 vif to VM

[R0me0 ***]

Hi there,

I am trying to add 6 vif to OpenBSD VM

But the maximum allowed is 4

If I add more than 4 I receive the follow message:

d0v0 Over-allocation for domain 1: 262401 > 262400

is there any configuration to add more vif's?

Also I have added xen-netback.netback_max_groups=12 which I thought could
fix. But no.

Thanks in advance,