Fix: unset permalink for files

src/components/PageSettingsModal/PageSettingsModal.jsx

@@ -62,11 +62,13 @@ export const PageSettingsModal = ({
           shouldValidate: true,
         })
       )
-      if (pageData.content.frontMatter.file_url)
+      if (pageData.content.frontMatter.file_url) {
         // backwards compatible with previous resource files
         setValue("layout", "file", {
           shouldValidate: true,
         })
+        setValue("permalink", undefined)
+      }
     }
   }, [pageData, setValue])