Ensure that the most recent transaction date of the membership is not later than the payment date:
  1. Go to Constituents > Constituent search
  2. Go to the Memberships page
  3. Click on the appropriate Membership to open the Membership record
  4. Go to the Transactions 
  5. Highlight the most recent transaction and click "Edit" (or "Delete" if you wish to remove it)
  6. Set the transaction date BEFORE the payment date