diff --git a/www/manager/form/ComboGrid.js b/www/manager/form/ComboGrid.js
index f4a642ea..3719a3f4 100644
--- a/www/manager/form/ComboGrid.js
+++ b/www/manager/form/ComboGrid.js
@@ -87,6 +87,7 @@ Ext.define('PVE.form.ComboGrid', {
 		form.setLoading(false);
 	    }
 	    if (success) {
+		me.clearInvalid();
 		var def = me.getValue();
 		if (def) {
 		    me.setValue(def, true); // sync with grid