On November 2, 2021, German Post issued a stamp on the theme "100 years German Dancing Federation". The imprinted EAN code (European Article Number), with the number "4 050357 018797" on the sides of the miniature sheet had already been used. The stamp "Willy Brandt - Kneeling in Warszaw 50 years ago" already had this EAN code. The correct EAN code for the German Dancing Federation stamp was "4 050357 020455".

If one scans the German Dancing Federation stamp, one arrives with the number on information to the "Kneeling" stamp in the internet. It appears that the entire print run has the wrong EAN code. An initial report that the stamps had been withdrawn proved to be without substance.