The alert "All license entitlements must be covered by current maintenance. Please remove the excess or cover the shortfall" is a notice to you that there may be an issue with the maintenance coverage for this license. In your case, this alert is expected and tells you what you already know about the maintenance coverage on this license: it has expired.

You can clear the alert in one of 3 ways:

1. Manually hide the alert using the eye icon next to the alert
2. Select the "Planned non-renewal" on the Compliance tab of the license
3. Select the "Allow maintenance gap" check box for your maintenance purchases on the Purchases tab of the license

Options 2 and three will prevent the alert from displaying for either the license as a whole or for a specific maintenance purchase.