diff --git a/src/Ticket.php b/src/Ticket.php
index 230ce200cca..baec13f9afd 100644
--- a/src/Ticket.php
+++ b/src/Ticket.php
@@ -4319,6 +4319,31 @@ public function showForm($ID, array $options = [])
             }
         }
 
+        // Default check
+        if ($ID > 0) {
+            $this->check($ID, READ);
+        } else {
+            // Create item
+            $this->check(-1, CREATE, $options);
+        }
+
+        $userentities = [];
+        if (!$ID) {
+            $userentities = $this->getEntitiesForRequesters($options);
+
+            if (
+                count($userentities) > 0
+                && !in_array($this->fields["entities_id"], $userentities)
+            ) {
+                // If entity is not in the list of user's entities,
+                // then use as default value the first value of the user's entites list
+                $first_entity = current($userentities);
+                $this->fields["entities_id"] = $first_entity;
+                // Pass to values
+                $options['entities_id']      = $first_entity;
+            }
+        }
+
         // Check category / type validity
         if ($options['itilcategories_id']) {
             $cat = new ITILCategory();
@@ -4326,7 +4351,7 @@ public function showForm($ID, array $options = [])
                 switch ($options['type']) {
                     case self::INCIDENT_TYPE:
                         if (!$cat->getField('is_incident')) {
-                             $options['itilcategories_id'] = 0;
+                            $options['itilcategories_id'] = 0;
                         }
                         break;
 
@@ -4342,35 +4367,11 @@ public function showForm($ID, array $options = [])
                 // Check category / entity validity
                 if (!in_array($cat->fields['entities_id'], getSonsOf('glpi_entities', $options['entities_id']))) {
                     $options['itilcategories_id'] = 0;
+                    $this->fields['itilcategories_id'] = 0;
                 }
             }
         }
 
-        // Default check
-        if ($ID > 0) {
-            $this->check($ID, READ);
-        } else {
-            // Create item
-            $this->check(-1, CREATE, $options);
-        }
-
-        $userentities = [];
-        if (!$ID) {
-            $userentities = $this->getEntitiesForRequesters($options);
-
-            if (
-                count($userentities) > 0
-                && !in_array($this->fields["entities_id"], $userentities)
-            ) {
-                // If entity is not in the list of user's entities,
-                // then use as default value the first value of the user's entites list
-                $first_entity = current($userentities);
-                $this->fields["entities_id"] = $first_entity;
-                // Pass to values
-                $options['entities_id']      = $first_entity;
-            }
-        }
-
         if ($options['type'] <= 0) {
             $options['type'] = Entity::getUsedConfig(
                 'tickettype',