Contract issues

[Boopeedoop]

Hi. I hope someone can help.
Teen on an apprenticeship. Was told they would be on X rate. And they were for several months. New accounting team are saying they are being over paid by 40p per hour, and hourly rate will now drop. This has been checked with HR and the contract stored on the computer confirms this.

However! Paper contract shows an entirely different pay rate. Much more money! The former account head signed it, as did apprentice.

Does this mean that the apprentice can expect to be paid the contracted rate they signed for on both paper copies?

Thanks so much in advance.

I would think the signed version would supercede any unsigned template, assuming it was signed by employer and employee.

Yes both copies are signed by the relevant people.

The only error is the date they started at the company. This wasn't picked up by either party when it was signed.