I tried upgrading our 2.x ES to 5.x and everything went fine, but then our app was still not ready to work with 5.x. I had to revert back to 2.x, which was fine, but the restore from the snapshot couldn't restore everything, so our data is missing now.
But, I had copied the 5.x index data over and it seems to have the missing data, how can I go about moving that data over to 2.x? I am running a new instance of 5.x with all the data intact, is it even possible to copy over data like this?