diff --git a/migrations/versions/0125_remove_unique_constraint.py b/migrations/versions/0125_remove_unique_constraint.py
new file mode 100644
index 000000000..0039bb931
--- /dev/null
+++ b/migrations/versions/0125_remove_unique_constraint.py
@@ -0,0 +1,25 @@
+"""
+
+Revision ID: 0125_remove_unique_constraint
+Revises: 0124_add_free_sms_fragment_limit
+Create Date: 2017-10-17 16:47:37.826333
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+revision = '0125_remove_unique_constraint'
+down_revision = '0124_add_free_sms_fragment_limit'
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index('ix_service_sms_senders_service_id', table_name='service_sms_senders')
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_index(op.f('ix_service_sms_senders_service_id'), table_name='service_sms_senders')
+    op.create_index('ix_service_sms_senders_service_id', 'service_sms_senders', ['service_id'], unique=True)
+    # ### end Alembic commands ###