Apple enterprise account - Inhouse and Adhoc certificate option disabled

There are currently 2 active certificates in the Apple enterprise developer account. One certificate belongs to one application is going to expire in a week, when I try to create a new certificate the option 'In-house and adhoc' is disabled with error text 'Maximum number of certificates generated'.

This is the first time I encountered this issue. There was a 3rd certificate also, I have revoked 3 days back as that certificate not required, still displaying the same error.

If anyone faced the similar issue in the past, please share how this can be solved.

Apple enterprise account - Inhouse and Adhoc certificate option disabled
 
 
Q