Content Directory option is available and throws warnings when newer package version was previously installed in the project and currently the older version is installed

How to reproduce:
1. Create a new Unity project and install the 3.1.0 ver. Addressables package
2. Change the Addressables package version to 2.11.1
3. Go to Window -> Asset Management -> Addressables -> Groups
4. Right-click -> Create New Group 
5. Observe the results

Expected results: Content Directory is not available
Actual results: Content Directory is available and adding it throws warnings

Reproducible with: 2.11.1 (6000.7.0a2)

Reproducible on: macOS Tahoe 26
Not reproducible on: No other environment tested

Note: The bug is reproducible even after fully reinstalling the package, if the 3.1.0 was ever installed in the project, the bug is reproducible

Full warnings:

• Cannot add null Schema object.
  UnityEditor.GenericMenu:CatchMenu (object,string[],int) (at /Users/bokken/build/output/unity/unity/Editor/Mono/GUI/GenericMenu.cs:162)
• Invalid index for data builder: 3.
  UnityEditor.GenericMenu:CatchMenu (object,string[],int) (at /Users/bokken/build/output/unity/unity/Editor/Mono/GUI/GenericMenu.cs:162)