You can't apply this premium code to your account. this is likely because you have an existing premium subscription that cannot be combined with a premium code.
a. Contact customer support to verify your current subscription status and inquire about applying the premium code.
b. Cancel your existing premium subscription before applying the premium code.
c. Use the premium code on a different account or create a new account.
d. Look for alternative ways to redeem the premium code, such as through a different platform or service.