diff --git a/inventory/templates/coffee.html b/inventory/templates/coffee.html
index fc2041a..079ce5a 100644
--- a/inventory/templates/coffee.html
+++ b/inventory/templates/coffee.html
@@ -72,10 +72,10 @@
             // Check if all checkboxes are checked
             const allChecked = Array.from(document.querySelectorAll('.form-check-input')).every(cb => cb.checked);
             const allUnchecked = Array.from(document.querySelectorAll('.form-check-input')).every(cb => !cb.checked);
-            if (allChecked && !window.__alreadyNavigated) {
+            if (allChecked && !window.__alreadyNavigated && {{ level }} < 28) {
                 window.__alreadyNavigated = true;
                 location.href = "{{ url_for('main.coffee', level=level + 1) }}";
-            } else if (allUnchecked && !window.__alreadyNavigated) {
+            } else if (allUnchecked && !window.__alreadyNavigated && {{ level }} > -2) {
                 window.__alreadyNavigated = true;
                 location.href = "{{ url_for('main.coffee', level=level - 1) }}";
             }