diff --git a/archivebox/machine/migrations/0001_initial.py b/archivebox/machine/migrations/0001_initial.py
index e82e7f60..aee3400f 100644
--- a/archivebox/machine/migrations/0001_initial.py
+++ b/archivebox/machine/migrations/0001_initial.py
@@ -105,8 +105,6 @@ class Migration(migrations.Migration):
                     id TEXT PRIMARY KEY NOT NULL,
                     created_at DATETIME NOT NULL,
                     modified_at DATETIME NOT NULL,
-                    num_uses_succeeded INTEGER NOT NULL DEFAULT 0,
-                    num_uses_failed INTEGER NOT NULL DEFAULT 0,
 
                     machine_id TEXT NOT NULL,
                     binary_id TEXT,