diff --git a/client/ayon_core/lib/path_templates.py b/client/ayon_core/lib/path_templates.py
index 057889403c..9e3e455a6c 100644
--- a/client/ayon_core/lib/path_templates.py
+++ b/client/ayon_core/lib/path_templates.py
@@ -587,8 +587,8 @@ class FormattingPart:
                 if sub_key < 0:
                     sub_key = len(value) + sub_key
 
-                invalid = 0 > sub_key < len(data)
-                if invalid:
+                valid = 0 <= sub_key < len(value)
+                if not valid:
                     used_keys.append(sub_key)
                     missing_key = True
                     break