The Walking Dead ended with many characters already set to embark onto spinoffs, which has caused quite a few instances of retconning to the flagship show's series finale. In The Walking Dead's final episode, a hopeful overtone was present with Alexandria, Hilltop, and a new Commonwealth rebuilding, Daryl heading off to search for Rick, and characters finding stable roles in new jobs. In terms of threats, The Walking Dead thwarted the main antagonist group with a takeover and all communities were seemingly defensible from walkers.

https://screenrant.com/walking-dead-spinoffs-main-show-ending-retcons/