It may not be. If the coin is clearly a BU coin that has been waffled it may be an error, but when the Euro was introduced the central bank in each country redeemed a HUGE amount of obsolete coinage (and most still are). These coins were waffled and then sold as scrap metal, largely to China. It is very possible that some got back into numismatic channels.
How fascinating @Conder101! I never knew that... Now, please, someone impress me with a Belgian waffle
Mint leaves and the proper name for this version is Classic Belgian Waffle. You obviously like another version. lol
The few times, I’ve been I’m afraid I ordered the not so classic one. They are tasty nonetheless. They also do great fries there too.
Around here (NW, DE) there's Bergische Waffeln - named after the former country of Berg, still known as a region - and Belgische Waffeln - from Belgium or Belgian style. The Berg variety is usually a little softer and comes with cherries and whipped cream, but there are several varieties too. Uh, I need to stop here ... The canceled German sets do not really make the federal government much richer, hehe. Usually canceled coins are sold as scrap metal in huge lots by the feds (or rather by Vebeg, a government agency). I think that sometimes the mints - which are state operated - keep and then sell some; not many though. I bought such a set myself; those loose pieces I got for free, as well as DEM and EUR notes that went through shredders here. The bag on top (Ihr Geldbeutel) was given away on the occasion of the Bundesbank's 50th anniversary in 2007. The other one contains DEM notes in various denominations. The notes in that bag from 2002 had a total value of about 1,500 marks. Christian