Get a new 32kHz watch crystal, and put it in there in place of that one, as likely the one leg has been rotted away under the glue. You do not really need to use anything to hold the crystal, just a slightly longer lead on it and a drop of superglue on the top of the can to hold it to the board in a clean spot while keeping the can from shorting out anything else on the board. Nice convenient spot is already there between the crystal and the battery, where the soldermask is missing. Just be careful bending the leads, they are very fragile, I use some tweezers as a support between the can and the bend so you do not fracture the seal. Bend them, and it should drop right in, and then a drop of superglue by the battery side.