WS2P HEAD message can be incorrect on UPnP config

I'm using this configuration:

"ws2p": {
  "uuid": "65f71152",
  "privateAccess": true,
  "publicAccess": true,
  "preferedOnly": false,
  "privilegedOnly": false,
  "upnp": true,
  "maxPublic": 30,
  "maxPrivate": 10,
  "remotepath": ""
 }

Which generates the following messages:

WS2POC:HEAD:1:EGYd1ENzqoqFtBfgPuLfony8Bza9WEVLztDjpHJfCJNZ:87738-0000044E6E81C696B996C7D63E168271687D1D24347C2B8900182711C4B4DA99:65f71152:duniter:1.6.15:1
WS2POC:HEAD:2:2ny7YAdmzReQxAayyJZsyVYwYhVyax2thKcGknmQy5nQ:87738-0000044E6E81C696B996C7D63E168271687D1D24347C2B8900182711C4B4DA99:a0a45ed2:duniter:1.6.15:1:26:21

But this always leads me to this error:

https://git.duniter.org/nodes/typescript/duniter/blob/1.6/app/modules/ws2p/lib/WS2PCluster.ts#L147

In the end, I never see my HEADs accepted by any node.