Hello Aspirant,

Since this is an issue regarding making a change in the application it is better to contact the admission authorities for guidance . Anyways since you have not done any wrong entry or provided false information in your application I think you may be able to sort this problem during the verification process . You can mention the authorities about the new caste certificate but see to it that you carry your old RD number acknowledgement proof too . Be ready with all related documents and proofs to support the change you are making at the time of verification.

All the best