Gateway id already taken

i was trying to add an devide and i have id problem, id already taken. i deleted few time bcuz i didnt find the eui code now i found cant add id. can any one help pls?

This appears to be a duplicate post which is a waste of volunteers time.

As we are all volunteers here, some patience in waiting for replies is good as well.

Please search the forum and look at the documentation which clearly explains you can’t use the same id again for a gateway and that the id is not the EUI. Using the actual error message: