Right now am trying to buy something, but i got this error

This credit card is already linked to your PayPal account. Please add a different card or go to the Profile tab and choose Add or Edit Credit Card to update your card information.

When i already verified my debit card from Maybank (4 digits) code everything from the 1st page, i have done it.

But then, i already have this message You have 1 active cards Visa (XXXX-XXX)Visa (XXXX-XXXX) in your account.

And i have to re-enter my details which is not supposed to :/

Any1 has the same prob here ?