A mistake in diploma translation?

Shite, I just noticed that I made a mistake in my diploma translation. I missed one of the semesters and copied subjects from another - so they don't match.

Does anybody thinks this is a major flaw? Do HR in the Commission carefully note down all the marks, or is it just for confirmation that I do have a diploma? (then, I guess, they wouldn't even bother reading through the supplement).

Ah... and all because my official English supplement hasn't been issued by my Uni yet, darn ;p

Hmm... guess I found an indication what to expect in another topic: https://ec-traineeship.forumotion.com/march-2010-traineeship-f3/criteria-for-preselection-t4.htm
"- The final marks obtained for undergraduate (and postgraduate) degrees/diplomas – a balanced assessment should also take account of the candidate’s specialisations, as well as the academic institutions at which they studied."

So I guess they will not really read it through, but just see the general evaluation. Well, hopefully at least .