Shortcut on Windows for a specific action

Hey, i have a document with a bunch of rems and want to convert all rems from concept card to basic card by highlighting all of them and using the shortcut Ctrl + alt + q. However, this does not work for me, but the reverse does (converting basic cards to concept cards or description cards). If I try to use the shortcut, a @ gets typed. This issue may be caused by my use of a German keyboard, as I am a native German-speaker. Any solutions on how I can still use the shortcut?