diff --git a/module/ai/view/promptselectdatasource.html.php b/module/ai/view/promptselectdatasource.html.php
index 41478cbe71..b95515091b 100644
--- a/module/ai/view/promptselectdatasource.html.php
+++ b/module/ai/view/promptselectdatasource.html.php
@@ -460,7 +460,6 @@ $(function()
   /* Toggle disabled submit button. */
   window.dataSourceStore.subscribe(function(value)
   {
-    _isPromptDesignStepComplete = !!value.length;
     $('#submit').attr('disabled', !value.length);
   });