Update registration-dist.php

custompages/registration-dist.php

@@ -23,9 +23,16 @@ if (isset($content['form']->_elementIndex['extra_mail_notify_message'])) {
 if (isset($content['form']->_elementIndex['extra_mail_notify_group_message'])) {
     $content['form']->removeElement('extra_mail_notify_group_message');
 }
-$content['form']->removeElement('official_code');
+if (isset($content['form']->_elementIndex['official_code'])) {
-$content['form']->removeElement('phone');
+    $content['form']->removeElement('official_code');
-$content['form']->removeElement('submit');
+}
+if (isset($content['form']->_elementIndex['phone'])) {
+    $content['form']->removeElement('phone');
+}
+if (isset($content['form']->_elementIndex['submit'])) {
+    $content['form']->removeElement('submit');
+}
+
 if (isset($content['form']->_elementIndex['status'])) {
     $content['form']->removeElement('status');
     $content['form']->removeElement('status');