I have received the following message from EPSO:

It has come to EPSO’s attention that during the testing session of 6 March 2025, for the ongoing Translator competitions (EPSO/AD/414-421/24 – 8 languages), EPSO’s external contractor allowed a set-up defect in all the multiple-choice questionnaire (MCQ) tests. This led to a high number of candidates submitting more than one answer, despite the explicit mention in the instructions that there was only one correct answer.

EPSO analysed the situation thoroughly and with the unanimous agreement of the Selection Boards concerned, concluded that to ensure equal treatment among all candidates, it will have to retest all candidates who were present at the online testing session of 6 March 2025 (candidates with a justified reason for absence will also be invited). Therefore, new tests will be organised with new test content of an equivalent level of difficulty.

Retesting session date: 14 May 2025

I honestly don't understand how this decision can be considered fair. I'm not at all sure if I passed the MCQ tests, but the instructions were clear and, regardless of the number of candidates who marked several options instead of one, I'm sure many more candidates followed them correctly. The reasonable thing to do would be to eliminate all those candidates or give us all a pass, but not that thousands of candidates have to retake the exam in a month's time. 
I understand that the decision is final and cannot be appealed, but I would like to know what you think.
Thank you in advance.