diff --git a/ccp/js/methodeditorcontroller.js b/ccp/js/methodeditorcontroller.js
index 1923476..cf95ad6 100644
--- a/ccp/js/methodeditorcontroller.js
+++ b/ccp/js/methodeditorcontroller.js
@@ -586,7 +586,7 @@ class CCPMethodEditorController extends HTMLElement{
         ev.stopPropagation()
         const val = ev.target.value
         ev.target.value = null
-        if(this.#current.metadata.filter().length === 0){
+        if(this.#current.metadata.filter(md=>md.role === "category").length === 0){
           this.#current.metadata.push({ role : "category", title : val})
         }
       }