Flat Rate Expenses

My Revenue documents every year have a Flat Rate Exps deduction of 85 euros. I always just clicked to confirm and submit the tax return. But now I just tried to find out exactly what this 85 euros means, and the only matching amount I can see in the Revenue list of Flat Rate Expenses is for tools and uniforms for fitters and mechanics in the motor trade. That is not my job or industry. I have some old tax documents going back over 15 years showing the same amount. I don't know how I first got this allowance as I am sure I would never have asked for it. Years ago before I had an online account, when there was still a local public tax office, I used to just visit in person to review my tax return, so maybe it got added then through a misunderstanding. But my job or industry is not one that could be mistaken for mechanic.

According to the list, there does not appear to be any deduction available for my actual occupation. Is it possible that there was 85 euros available in the past for something relevant to my job and which has since been removed? If I just delete this Flat Rate Expense now for the 2022 tax year, would that sort out the issue, or would there be implications for all my previous tax returns over the years?

My spouse also has a deduction, of a few hundred euros, but in that case the amount is correct for the occupation.