diff --git a/mydata_benchmarks/migrations/0006_empty_benchmark_id.py b/mydata_benchmarks/migrations/0006_empty_benchmark_id.py
new file mode 100644
index 0000000..4615cfc
--- /dev/null
+++ b/mydata_benchmarks/migrations/0006_empty_benchmark_id.py
@@ -0,0 +1,23 @@
+# Generated by Django 2.1.3 on 2018-11-06 16:24
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('mydata_benchmarks', '0005_remove_is_valid'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='benchmark',
+            name='benchmark_id',
+            field=models.CharField(blank=True, db_index=True, editable=False, max_length=48),
+        ),
+        migrations.AlterField(
+            model_name='benchmark',
+            name='manage_id',
+            field=models.CharField(blank=True, editable=False, max_length=48),
+        ),
+    ]