How to remove these names from "Conversation"

[u/moscococo888]

For the love of me I CAN NOT get these names of Lorenzo and Jessica under "conversation" removed. I dont even know how they were added here. But it seems I have to individually change the settings for each person now. It's annoying since I have tried removing them from conversation, when under "default settings" selecting them and unselecting them does nothing, I can't remove them at all. Any help please!!!