diff --git a/SAS/TMSS/backend/src/tmss/tmssapp/migrations/0001_initial.py b/SAS/TMSS/backend/src/tmss/tmssapp/migrations/0001_initial.py
index 021f8b2920bda008745595e13601416bf908377e..5d19ced6b7659cc33e41585611baf168cc7aeac1 100644
--- a/SAS/TMSS/backend/src/tmss/tmssapp/migrations/0001_initial.py
+++ b/SAS/TMSS/backend/src/tmss/tmssapp/migrations/0001_initial.py
@@ -661,7 +661,6 @@ class Migration(migrations.Migration):
                 ('actual_on_sky_stop_time', models.DateTimeField(help_text='The time the observation actually stopped recording (NULLable).', null=True)),
                 ('primary', models.BooleanField(db_index=True, default=False, help_text='TRUE if this is the one-and-only primary subtask in a parent TaskBlueprint.')),
                 ('specifications_doc', django.contrib.postgres.fields.jsonb.JSONField(help_text='Final specifications, as input for the controller.')),
-                ('error_reason', models.CharField(null=True, max_length=200, help_text='Reason why the Subtask went to error.')),
                 ('raw_feedback', models.CharField(help_text='The raw feedback for this Subtask', max_length=1048576, null=True)),
             ],
             options={
diff --git a/SAS/TMSS/backend/src/tmss/tmssapp/migrations/0004_subtask_error_reason.py b/SAS/TMSS/backend/src/tmss/tmssapp/migrations/0004_subtask_error_reason.py
new file mode 100644
index 0000000000000000000000000000000000000000..d68ab0542036ed403ec9601540f1f0ff65cc562c
--- /dev/null
+++ b/SAS/TMSS/backend/src/tmss/tmssapp/migrations/0004_subtask_error_reason.py
@@ -0,0 +1,18 @@
+# Generated by Django 3.0.9 on 2021-10-15 07:51
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('tmssapp', '0003_taskblueprint_shortdescription'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='subtask',
+            name='error_reason',
+            field=models.CharField(help_text='Reason why the Subtask went to error.', max_length=200, null=True),
+        ),
+    ]