Here's how to create a proper auto-linking flow:

1. Create a brand new flow instead of modifying the existing one:

   • Go to Authentication > Flows

   • Click "Create" and name it "Auto Link Identity Provider Flow" (or similar)

   • Click "Save"

2. Add only these two authenticators in this exact order:

   • First, add "Detect Existing Broker User"

     • Set requirement to "REQUIRED"

   • Second, add "Automatically Set Existing User"

     • Set requirement to "REQUIRED"

3. Keep the flow simple - do not add any other authenticators or subflows

4. Configure your Google/Gmail identity provider:

   • Go to Identity Providers

   • Select your Google provider

   • Change "First Login Flow" to your new flow

   • Set "Sync Mode" to "force" if you want profile updates

   • Save changes