CAF number isn’t supposed to be mandatory now since there are no physical rights composite application forms. If the bank hasn’t removed it from their portal, you can enter any dummy number (For e.g.your PAN). Please reach out to your bank for making the required changes on their portal. Some banks have already grey-ed out this field.
Source - Rights Issues and Rights Entitlements (RE) - FAQs
demat details - What are DP name, DP ID, BO ID and demat ID?