Offline Edit Set Resolved Date

I am trying to import data into RT from an older system and the existing template shows a Resolved field, but nothing I put in there will actually get the date in the system, it also sets to the current time. I have tried going through the archives and wasn’t able to find what I was looking for. I can set the other fields like started, but it never lets me set Resolved. An alternative I thought about is to import it into an unused field (like starts) and then use sql to copy over to resolved. I did that and experienced some weirdness that may or may not have been related to the db copy. So I would rather import it correctly.

Help is appreciated. Also, if anyone has a better method to import tickets I am open to suggestions.