Friend request error

I cannot send a friend request to a specific user who was in friend list with a message: “You are already friends with that invitee.” and also there is no sent request in “Sent Friend Requests” list on Battle.net app. If the specific user send me a friend request, it is shown to the user as the request is normally sent but I don’t get any request. Both we have enough space in friends list and we didn’t block each other. This bug occurs only between me and one specific user. I think there was a malfunction while the user removing me from his friend list.


Solved.
Change the server. ex) Asia -> Europe
Launch the game and check your friend list in the game.
If you confirm the user on you friend list, remove the friend and resend the request. The request will be successfully set.