in die falsche

listen to the pronunciation of in die falsche
Almanca - İngilizce
in the wrong
To be incorrect about what you say or think, to be in error

See here what it says in Wiktionary. So, you were in the wrong about the meaning of that word.

Wrong; against justice, truth or fact. "The driver was in the wrong and was arrested by the police after the accident."
mistaken, wrong