diff --git a/config/config.go b/config/config.go
index cffda00..816ad8f 100644
--- a/config/config.go
+++ b/config/config.go
@@ -174,9 +174,10 @@ func UpdateConfig(key, value string, ctx context.Context) error {
 		return nil
 	}
 
-	if _, ok := uiDefaults[key]; !ok {
-		return errors.New("this configuration key does not exist")
-	}
+	// Disabled because now `plot_list_selectedMetrics:<cluster>` is possible.
+	// if _, ok := uiDefaults[key]; !ok {
+	// 	return errors.New("this configuration key does not exist")
+	// }
 
 	if _, err := db.Exec(`REPLACE INTO configuration (username, confkey, value) VALUES (?, ?, ?)`,
 		user.Username, key, value); err != nil {
diff --git a/frontend b/frontend
index fdf89ac..415335f 160000
--- a/frontend
+++ b/frontend
@@ -1 +1 @@
-Subproject commit fdf89ac36ff7eb12fabd483ad6e50d55cc118b8b
+Subproject commit 415335f616f36e5c0785aee1a63eacb1803a57c9