Another team didn't bother testing their code correctly, they passed us invalid values that another microservice needs, as a result they have a bunch of unstored data (that they would have seen wasn't being stored if they bothered checking the last stage of the process to see if it was stored). Now it's been so long that the data is expired. They want us to manually store millions of transactions for them.

Now tell me...if I came and shit in your bed, shouldn't I have to clean it up?