NetBSD 10.1 amd64 wireguard can add only 6 peers?

[Mayuresh <mayuresh%warunjikar.in@localhost>]

The wireguard with NetBSD 10.1 amd64 as endpoint worked fine for up to 6
peers.

When I add a 7th peer:

    # wgconfig wg0
    wgconfig: ioctl(SIOCGDRVSPEC): Invalid argument

There is nothing specifically wrong with the 7th peer. I removed one of
the working peers and added the new one and it worked. Now if I add the
removed peer that was previously working, above happens.

Anyone else faced this? If there is such limit, is it configurable?

-- 
Mayuresh