Uhm yes it does. Starfleet Doffs do not work on KDF toons.
You can tell he is a Starfleet Doff by the blue outline and the fact that it says Starfleet in the background of his picture.
... bingo. The Doff you showed a picture of is a Starfleet Doff. He will not work on a KDF character. Easy answer.
"... I really don't care if you try to make money, Cryptic. I do care when you have to insult my intelligence by saying it isn't about money, and use a hot button issue like 'content quality' in order to push that narrative." -Iconians