diff --git a/alembic/versions/802047d28f89_drop_unique_constraint_on_commit_uid.py b/alembic/versions/802047d28f89_drop_unique_constraint_on_commit_uid.py
new file mode 100644
index 0000000..7c6b721
--- /dev/null
+++ b/alembic/versions/802047d28f89_drop_unique_constraint_on_commit_uid.py
@@ -0,0 +1,28 @@
+"""Drop unique constraint on commit UID
+
+Revision ID: 802047d28f89
+Revises: 5a2327825b9a
+Create Date: 2019-05-06 12:52:25.221300
+
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '802047d28f89'
+down_revision = '5a2327825b9a'
+
+
+def upgrade():
+    """ Remove the constraint named: commit_flags_uid_key, pass otherwise. """
+    try:
+        op.drop_constraint('commit_flags_uid_key', 'commit_flags')
+    except:
+        pass
+
+
+def downgrade():
+    """ We do not want to go back in fact. """
+    pass