Expression for "pulling out something from the past"

I am looking for an expression (proverb / idiom) meaning "pulling out something from the past" in disapproval.

An example of this would be: somebody mentioning a thing of the past, which is not relevant anymore. Do we have a proverb / idiom with this meaning?

Solution 1:

The only things that spring to mind are these:

"That's a dead issue."

or

"I thought that was dead and buried."

and

"Stop beating a dead horse," or, "You're just beating a dead horse."

Somewhat related to this might be:

"That was old when Moses was a boy."

Solution 2:

One might say the person is "Digging up bones" or "Raking up the past" or failing to "let it die".