Merged in bugfix/PMCORE-548 (pull request #7301)

PMCORE-548

Approved-by: Julio Cesar Laura Avendaño <contact@julio-laura.com>

workflow/engine/methods/cases/caseMessageHistory_Ajax.php

@@ -76,7 +76,7 @@ switch ($actionAjax) {
                 &&
                 (
                     $appMessageArray[$index]['DEL_INDEX'] == 0
-                    || in_array($appMessageArray[$index]['DEL_INDEX'], $delIndex)
+                    || in_array($appMessageArray[$index]['DEL_INDEX'], $delIndex) || empty($respMess)
                 )
             ) {
                 //Define the label with translation

workflow/engine/src/ProcessMaker/Model/ObjectPermission.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace ProcessMaker\Model;
+
+use Illuminate\Database\Eloquent\Model;
+
+class ObjectPermission extends Model
+{
+    protected $table = "OBJECT_PERMISSION";
+    protected $primaryKey = 'OP_UID';
+    public $timestamps = false;
+}