BERLIN (Reuters) - Germany must redesign its euro coins, after minting millions, because the stars of Europe that encircle it leant to the side, an official said on Wednesday. A spokesman for the Building Ministry that is responsible for currency design told Reuters the slip-up lay in the direction of the stars` points on trial coins being minted since last month. The stars on all countries` euro coins, as on the blue European Union flag, must have their top point directed upwards but Germany`s fanned outwards. In Berlin alone, just one of several mints in Germany, about two million coins were minted with the flawed design. The euro will become the official currency in Germany, France and nine other European Union states on January 1 but euro coins and notes will not replace marks, francs and other national currencies until 2002. "The German coin design was based on a description which was open to interpretation," Building Ministry spokesman Wolfgang Jenders told the Berliner Zeitung daily.