Unless the original image was the idol and someone found and claimed it? But if that were the case why would it be moved to NuMushu? A lot of questions left unanswered.

If it's nothing, I'll still find a way to use it as some sort of paranoia "someone on Mushu has the idol -- someone on NuMushu found the idol" tactic if necessary. I may not need to, but at least I have it in my arsenal.