If your Target ID is changing with each sweep on the same detected object in the ground, there may be multiple reasons for it that don’t involve the detector being faulty. It could be a large, flat piece of iron, it could be a good target that is lying on its edge, or it could be a good target lying adjacent to multiple trash items. Iron Reject, discrimination, and/or notching features may help to gather more information, but the best way to find out if there is a good target is to dig.