Denying connection from <IP> - - reason: INVALID_HANDSHAKE Spam

[HandsomeshadowYT]

My console continously in both servers keeps getting spammed by this message

"Denying connection from - - reason: INVALID_HANDSHAKE"

I did a whole cleanup i tried changing IP but didnt work and i cant find a solution online

So i need help

[Xertien]

I have same probleme IDK