Doubt regarding caste certificate

I want to take admission in the bsc msc forensic sciences course and I belong to the obc category. I do have the certificate with me but it was issued in 2024 .I tried to renew it through the online portals but it got rejected every time in the past couple of months. My cuet exams got over a couple of days before, so most probably I'll be going out to the govt office myself for the obc certificate renewal.

But I don't know how many days it's gonna take to complete the whole renewal process. If in case I don't get my renewed certificate before the 10th of June ...are there any alternatives available..like is there any undertaking form available? Or like what if I upload the old one in admision form but during the counselling I bring the renewed one (I fear my form's gonna get rejected if I go for the second option) ...

Seniors pls help