Being wrong in a group project teaches you how to recover in front of people. That’s a skill too.

Private mistakes you can quietly fix. A mistake in front of four people who are depending on you is a different thing, and the hard part is not the error but the thirty seconds afterwards, when you decide whether to defend it, hide it or own it. Recovering well is learnable: say what happened, say what you will do, move on.

Next time it happens, name it quickly and plainly, without a long apology. Offer the fix rather than the excuse. Watch how fast a group moves on when somebody does that, and how long it takes when they do not.