Server version Reminder removal

Hi We have had to rebuild and restore due to an upgrade issue.
However now there is a Reminder notice saying

Reminder —This is an evaluation version only. Please buy server edition to continue using the software without this notice.

below is a screen snip.

How do we get rid of this message. We have paid for the server version of the software.

The server license entitles you to free updates for one year. While you still own the license, you essentially revert to an evaluation copy after that time. See After the one-year point, license renewals are 50% of the original cost.