I created several related blocks on a master page. The blocks don't auto-continue; they're not master blocks. I then created them and filled them with text. Then I needed to group them with other elements. Then I no longer needed them, so I tried deleting the blocks. But InDesign wouldn't allow it, as it thought I needed to add pages. The block-by-block connection ended up going nowhere. After ungrouping, I started deleting the blocks one by one, and the last one in the chain ended up with a connection that led nowhere.