Duplicate GlobalKey detected in widget tree

Question

I am running into a globalKey error after I navigate from Screen A to Screen B and click a \"Cancel\" button to go back to Scree

Answer 1

In my case, it likes a hot reload bug. Just restart debugging works for me.

Answer 2

Make sure that you don't have a Form parent and a Form child with the same key

Answer 3

I had a similar problem. in my case the problem was that I had a function in dispose method of screen B and it wouldn't execute properly. I just removed it and the problem was fixed.

so be sure your dispose method is executed properly in all screens.

Answer 4

Remove the static and final type from the key variable so if

static final GlobalKey<FormState> _abcKey = GlobalKey<FormState>();

change it to

GlobalKey<FormState> _abcKey = GlobalKey<FormState>();