This usage often implies a negative feeling towards discussing the past, suggesting it's unhealthy or unnecessary. They always rake over past mistakes, bringing down the mood.
Pro Tip 2/3
Emotionally Charged
It is frequently used with emotional events, signaling that the discussion might reopen old wounds. Rachel dreaded family reunions because her relatives would rake over old disputes.
Pro Tip 3/3
Conversational Context
Mostly used in conversations, not formal writing, as it relates to personal or informal discussions. I wish he wouldn't rake over that story every time we talk.