Fetching details from the dictionary...
to reheat; to steam over
to bring up again (a problem that has been dealt with); to take up again; to drag up; to rehash
残り物を蒸返して昼食にした。
I reheated the leftovers for lunch.
終わった話を何度も蒸返すのはやめよう。
Let's stop bringing up things that are already over.
古い議論を蒸返しても解決にはならない。
Rehashing old arguments won't lead to a solution.