Update UserDataMultiDefault to fix another bug in setValue.

static/plugin_event/src/form/field/UserDataMultiDefault.js

@@ -118,15 +118,16 @@ Ext.define('Event.form.field.UserDataMultiDefault', {
         var me = this,
             combo = me.combo || null,
             form = me.up('xform, form').getForm(),
-            cfg, formRecord, rawValue;
+            cfg, formAction, formRecord, rawValue;
 
         // is the form ready
         if (!form) {
             return;
         }
 
-        // linked the ComboBox
+        // link the ComboBox
         // It is identified by its name, e.g HistororyId_events
+        // Attach handler to catch selected value in ComboBox
         if (!combo) {
             me.combo = form.findField(me.formFieldIdEvent);
             if (!combo) {
@@ -134,8 +135,7 @@ Ext.define('Event.form.field.UserDataMultiDefault', {
             }
         }
 
-        // check if the the select handler activated for the ComboBox
-        if (!combo.hasListener("select")) {
+        if (me.lastKey === undefined) {
             me.combo.on('select', me.onComboBoxSelect, me);
         }
 
@@ -157,11 +157,12 @@ Ext.define('Event.form.field.UserDataMultiDefault', {
         // form, instead, and extract the selected event.
         //
 
-        // get the data load in the form
+        // get action and data load in the form
+        formAction = form.owner.currentAction;
         formRecord = form.getRecord();
 
-        // get the selected event and retrieve its configuration
-        if (formRecord) {
+        // get the event
+        if (formRecord && formAction !== 'create') {
             me.lastKey = formRecord.get(me.formFieldIdEvent);
 
         } else {