Some rail type changes are not consistent with your rail instances customization in this project, you can reset them to make them corresponding with your changes.
Namespace: Autodesk.Revit.DB
Assembly: RevitAPI (in RevitAPI.dll) Version: 26.2.0.0 (26.2.0.0)
Syntax
C#
public static FailureDefinitionId RailTypeChangeInconsistancyWarningWithResetBtn { get; }