error - ? - Address already in use

[lejeczek]

Hi guys

what is below error the symptom of?
-> $ wg-quick up wg-r2
[#] ip link add wg-r2 type wireguard
[#] wg setconf wg-r2 /dev/fd/63
[#] ip -4 address add 10.3.3.254/24 dev wg-r2
[#] ip link set mtu 1320 up dev wg-r2
RTNETLINK answers: Address already in use
[#] ip link delete dev wg-r2

I'll only add that I looked into "obvious" places and found 
nothing.
many thanks, L.