User blog comment:EpsilonMk46/Luna in Garage Banned in a nutshell/@comment-24200891-20170727071431/@comment-31789809-20170727160716

Sure, that time he couldn't resolve the situation, but that doesn't mean that it applies to every single instance a fight occurs. Lincoln needed to learn that there were some situations that you just don't have a right to interfere with, even if you have the best intentions. So Lincoln still does have his peacemaking abilities, they just aren't necessary for every single fight that happens in the house, that's all.