Hello,

Yes, it can cause problems:

1. Identification Issue – The examiner may not be able to determine the correct question paper (QP) set you attempted.
2. Incorrect Evaluation – Your answers might be marked according to a different set, leading to wrong grading.
3. Disqualification Risk – Some exams have strict rules, and missing codes might result in disqualification.
4. Delayed Results – The board might take time to verify and assign the correct set.
5. Solution – Contact the exam authority immediately to inform them about the mistake.

Hope you find it useful !