Update:
Just applied for a debit card for the 2nd holder successfully.
NOTE:
1. Ensure that they are applying for the correct debit card. They have two internal codes for Rupay Select
68 - Rupay Select Debit Card (Chargable 1121)
91 - Cent Queen Woman's Debit Card (Correct card for Cent Queen holders)
Bonus trick:
Go to the branch when you expect less traffic, tolerate their unawareness of the technical aspects and engage in friendly conversations. Then only they will go the extra mile to help you out.
2. They will require an OTP from the 2nd account holder. So, be there at the branch until they ask you for the OTP and apply for your debit card. You will get an SMS confirmation after a successful application.