do NOT overwrite everything, if vfs-upload is used without id:

- using fallback id of "file_widget" the client-side uses
- ignore validation, if there is no id

api/src/Etemplate/Widget/File.php

@@ -47,6 +47,9 @@ class File extends Etemplate\Widget
 
 		if($xml) parent::__construct($xml);
 
+		// set fallback-id client-side uses
+		if (empty($this->id)) $this->id = 'file_widget';
+
 		// Legacy multiple - id ends in []
 		if(substr($this->id,-2) == '[]')
 		{

api/src/Etemplate/Widget/Vfs.php

@@ -352,7 +352,7 @@ class Vfs extends File
 				parent::validate($cname, $expand, $content, $validated);
 				break;
 		}
-		if (true) $valid = $value;
+		if (!empty($this->id)) $valid = $value;
 	}
 
 	/**