Newsblur self hosted: "Catching up 5 reading actions"

In NewsBlur self-hosted, I was trying to remove some of my saved stories by deleting the particular stores in ‘starred_stories’ in MongoDB. Now, although my user has no saved stories, the count next to the ‘Saved stories’ menu item still has a value. And more problematically, the mobile app constantly shows “Catching up 5 reading actions” on the bottom.

Is there an easy reset?