Final answer:
If you mess up and keep the wrong project going, you should email the person overseeing the project or your supervisor and explain the mistake politely. Ask for guidance on how to proceed and if any corrective actions need to be taken.
Step-by-step explanation:
If you mess up and keep the wrong project going, you should email the person who is overseeing the project or your supervisor. In the email, explain the mistake you made and why you believe it is the wrong project. Include any relevant details or evidence to support your claim.
Be polite and professional in your email, and ask for guidance on how to proceed and if any corrective actions need to be taken.