diff --git a/core/modules/media/src/MediaTypeForm.php b/core/modules/media/src/MediaTypeForm.php
index 003dcfee53..5f38b20055 100644
--- a/core/modules/media/src/MediaTypeForm.php
+++ b/core/modules/media/src/MediaTypeForm.php
@@ -404,12 +404,7 @@ public function save(array $form, FormStateInterface $form_state) {
    * @throws \Drupal\Component\Plugin\Exception\InvalidPluginDefinitionException
    */
   protected function isSourceChangeable() {
-
-    if (!$this->entity->isNew() && (!$this->fieldMapEmpty() || !$this->hasOnlySourceField() || $this->entityCount())) {
-      return FALSE;
-    }
-
-    return TRUE;
+    return $this->entity->isNew && ($this->fieldMapEmpty() || $this->hasOnlySourceField() || $this->entityCount() > 0);
   }
 
   /**
@@ -434,7 +429,6 @@ protected function entityCount() {
    *   If the source field is the only field.
    */
   protected function hasOnlySourceField() {
-    // Make sure this is an existing media entity.
     if ($this->entity->isNew()) {
       return TRUE;
     }