Sometimes you need to re-sync your Release Page with GitHub (to read about why this might occur check out this article).
To do this is simple, following these steps;
1. Click on the Release Page name on the page list to show the details panel.
2. Click the re-sync button in the repository table
This will schedule the repository for re-sync, which should take under a minute. You will be able to see the outcome of the re-sync in the history panel.