"It is never a problem getting things you "don't have" onto your inventory, it is only a problem for things that you "should have" on your inventory, but don't have."
A mate of mine, who's an ex-fishhead, told me of a time when he was on HMS Eagle, they were getting close to the UK and one of the embarked Sea Kings had a mishap and ended up in the briny whilst transporting gear back to the mainland.
For the next few days the ships stores were inundated with manifests detailing stuff that had gone walkies and couldn't be accounted for, which had now mysteriously become part of the unfortunate helicopter's cargo - no wonder the bloody thing crashed