Flutter: Update specific screen using provider that's consumed in multiple screens - flutter

Question

I have a typical CRUD operation task: (List Sites, Add Site, ...)
I created a SitesProvider. In the same provider, I added 2 methods for add and edit. I was thinking to use the same provider in the 2 screens (ListSites and AddEditSite)
In the ListSites screen, it works fine. Here is the problem:
I open the AddSite screen by clicking the AddButton in the ListSites screen
Hit submit (did not enter data, simulating error case)
The error gets displayed in the ListSites screen, not in the AddSite screen.
It makes sense. They both use the same provider, both screens are on the stack. It seems that the first one only consumes the state update and displays the error.
I use MultipleProviders approach that wraps the MaterialApp with all providers in the app.
Can we fix that without creating separate providers for each of the 2 screens?
EDIT:
I used provider.removeListener in the ListSites screen right before I open the AddEdit and it shows the error in the correct screen now. I still have to do some other tweaks to get it back to listen after I add. Not efficient I think but it is a step.

Answer 1

I ended up doing that:
Added Another Field in the provider (stateType: list/addedit)
Change the type per the screen I'm currently in
provider.stateType = UIStateType.add_edit;
await Navigator.push(context,
MaterialPageRoute(builder: (context) => AddEditSiteScreen()));
provider.stateType = UIStateType.list;
in build(), I check for the type
sitesProvider = Provider.of(context);
if (sitesProvider.stateType != UIStateType.add_edit) return Container();