Fix false positives (#6544)

frigate/http.py

@@ -295,7 +295,7 @@ def false_positive(id):
         return make_response(jsonify({"success": False, "message": message}), 404)
 
     # events from before the conversion to relative dimensions cant include annotations
-    if any(d > 1 for d in event.box):
+    if event.data.get("box") is None:
         message = f"Events prior to 0.13 cannot be submitted as false positives"
         logger.error(message)
         return make_response(jsonify({"success": False, "message": message}), 400)