diff --git a/src/applications/diffusion/controller/DiffusionBlameController.php b/src/applications/diffusion/controller/DiffusionBlameController.php
--- a/src/applications/diffusion/controller/DiffusionBlameController.php
+++ b/src/applications/diffusion/controller/DiffusionBlameController.php
@@ -198,6 +198,10 @@
       $map[$identifier] = $data;
     }
 
+    if (empty($epochs)) {
+      $epochs[] = 0;
+    }
+
     $epoch_min = min($epochs);
     $epoch_max = max($epochs);