In frontend filter the size A34 appears. (photo 1) When checking for this size on the product sheet the size is not avaiable. (photo 2) There are no virtual products with this size added to the dbase however. Backend it seems some configurable products are showing this size. (photo 3) Strangely, when filtering for the size A34 no products are shown. (photo 4) When looking at product card of one of the products seen in filter quiry (photo 3), the size A34 is shown without the possibility of correcting.(photo 5)
Can you share your attribute configuration?