diff --git a/src/Controllers/ElementalAreaController.php b/src/Controllers/ElementalAreaController.php
index 399a299e..915efd97 100644
--- a/src/Controllers/ElementalAreaController.php
+++ b/src/Controllers/ElementalAreaController.php
@@ -162,9 +162,11 @@ public function save(array $data, Form $form): HTTPResponse
      * @param array $data
      * @param int $elementID
      * @return array
+     * @deprecated 5.4.0 Will be removed without equivalent functionality to replace it.
      */
     public static function removeNamespacesFromFields(array $data, $elementID)
     {
+        Deprecation::noticeWithNoReplacment('5.4.0');
         $output = [];
         $template = sprintf(EditFormFactory::FIELD_NAMESPACE_TEMPLATE, $elementID, '');
         foreach ($data as $key => $value) {
diff --git a/src/Models/BaseElement.php b/src/Models/BaseElement.php
index f26fa9f7..020e2d16 100644
--- a/src/Models/BaseElement.php
+++ b/src/Models/BaseElement.php
@@ -653,9 +653,11 @@ public function getRenderTemplates($suffix = '')
      * Given form data (wit
      *
      * @param $data
+     * @deprecated 5.4.0 Will be removed without equivalent functionality to replace it.
      */
     public function updateFromFormData($data)
     {
+        Deprecation::noticeWithNoReplacment('5.4.0');
         $cmsFields = $this->getCMSFields();
 
         foreach ($data as $field => $datum) {