Steps to reproduce:
1. Create new Unity project
2. Import Tutorial Authoring Tools (com.unity.learn.iet-framework.authoring)
3. Create Tutorial Container (Create > Tutorials > Tutorial Container)
4. Select Tutorials.asset in Project window
5. In Inspector window > Section > Size add a size (for example 5)
6. Observe table of contents in Tutorials window

Actual results: “!” Warning icon is show in the table of contents
Expected results: No warnings shown

Reproducible with versions: 1.2.2 (2022.3.63f1), 1.3.2 (6000.0.50f1, 6000.1.5f1), 1.4.0-pre.2 (6000.2.0b4)

Tested on (OS): macOS Silicon, Sequoia 15.5