State Bank Of India [SBI] — Credit card application status is decline after all the verifications are successfully done

I have applied for an SBI credit card and this is my first credit card application in SBI. I don't have an SBI savings account and while verification, they told it's not needed to get the credit card. Two rounds of telephonic verification are done from Hyderabad and Chennai locations. When I checked the status online it is showing as "We regret to inform you that application has been declined due to internal policy". I would like to know the reason why my application could not be processed. I don't have any loan till now.

I have attached the image showing the application number and the declined status.