diff --git a/debug_toolbar/panels/templates/panel.py b/debug_toolbar/panels/templates/panel.py
index ace5a6bd4..903545997 100644
--- a/debug_toolbar/panels/templates/panel.py
+++ b/debug_toolbar/panels/templates/panel.py
@@ -100,8 +100,10 @@ def _store_template_info(self, sender, **kwargs):
                 key_values = sorted(context_layer.items())
                 if key_values in self.seen_layers:
                     index = self.seen_layers.index(key_values)
-                    pformatted = self.pformat_layers[index]
-                    context_list.append(pformatted)
+                    pformat_layers = self.pformat_layers
+                    if pformat_layers and index in list(zip(*enumerate(pformat_layers)))[0]:
+                        pformatted = self.pformat_layers[index]
+                        context_list.append(pformatted)
                 else:
                     temp_layer = {}
                     for key, value in context_layer.items():