Value: 50201
WebEventCodes.InvalidTicketFailure is the detail code that specifies the cause of the user's authentication failure.
When the user's authentication fails due to an invalid ticket, ASP.NET raises a System.Web.Management.WebAuthenticationFailureAuditEvent with a major code of WebEventCodes.AuditFormsAuthenticationFailure and a detail code of WebEventCodes.InvalidTicketFailure.