Linux String Substitute (sed) Failed

Good day. I’ve complete task “Linux String Substitute (sed)” but it marked as failed. Result of this task was right. I have requested review and other engineers don’t find any errors too. What kind of mistakes it can be?
login of kodekloud is Sintipuh

Hi @Sintipuh, seems like your command is missing to update these lines from the file.

Yes, I thought about it in beginning of the task. Then the task is not quite unambiguously set… But OK i’m understand. Thank you!