in the wrong {~noun}
1
deserving blame for a mistake, argument, accident, etc.
- He was in the wrong when he accused her without any proof.
- I think I’m in the wrong for interrupting you earlier.
- She felt she was in the wrong after seeing how upset he was.
- You can’t always prove who’s in the wrong in an argument.
- In this case, they are clearly in the wrong for not following the rules.