Getting notifications about expired licenses every time you open Prism Central, however, the licenses have been renewed? 

Dont worry! If you renewed the licenses and the old expiration date is still showing up on Prism Central or the Portal all we need to do is relicense Prism so the latest expiration date is updated. Complete the Licensing process in Prism Central and your environment shouldl be updated to the latest expirations.

Check KB 8098 for detailed instructions for non renewed and KB 7837 for already renewed licenses…