diff --git a/kubejs/startup_scripts/sophisticated_backpacks/constants.js b/kubejs/startup_scripts/sophisticated_backpacks/constants.js
index 14d34959f..678c219fb 100644
--- a/kubejs/startup_scripts/sophisticated_backpacks/constants.js
+++ b/kubejs/startup_scripts/sophisticated_backpacks/constants.js
@@ -21,6 +21,8 @@ global.SOPHISTICATED_BACKPACKS_DISABLED_ITEMS = [
     'sophisticatedbackpacks:compacting_upgrade',
     'sophisticatedbackpacks:advanced_feeding_upgrade',
     'sophisticatedbackpacks:feeding_upgrade',
-    'sophisticatedbackpacks:anvil_upgrade'
+    'sophisticatedbackpacks:anvil_upgrade',
+    'sophisticatedbackpacks:stack_upgrade_starter_tier',
+    'sophisticatedbackpacks:copper_backpack'
 ];