Index: main/plugin-cms/resources/js/Ametys/plugins/cms/params/ParameterFilesTree.i18n.js
===================================================================
--- main/plugin-cms/resources/js/Ametys/plugins/cms/params/ParameterFilesTree.i18n.js	(revision 31394)
+++ main/plugin-cms/resources/js/Ametys/plugins/cms/params/ParameterFilesTree.i18n.js	(working copy)
@@ -238,7 +238,7 @@
 	{
 		var node = this.getSelectionModel().getSelection()[0];
 		this._currentEditNode = node;
-		return true;
+		return !node.isRoot();
 	},
 	
 	/**