CPM - Validation failed on create of a Incident

Content

Please see image for the error and the code block for the code - any reason for this?

Code Snippet

             <?php

/**
 * CPMObjectEventHandler: MinimalIncidentHandler
 * Package: RN
 * Objects: Incident
 * Actions: Create, Update
 * Version: 1.2
 * Purpose: Minimal CPM handler for incident create and update.
 */
use \RightNow\Connect\v1_2 as RNCPHP;
use \RightNow\CPM\v1 as RNCPM;

/**
 * Handler class for CPM
 */
class MinimalIncidentHandler implements RNCPM\ObjectEventHandler
{

    /**
     * Apply CPM logic to object.
     * @param int $runMode
     * @param int $action
     * @param object $incident
     * @param