diff --git a/airflow/migrations/versions/004c1210f153_increase_queue_name_size_limit.py b/airflow/migrations/versions/004c1210f153_increase_queue_name_size_limit.py
index 2fe63e3801520..76245097b4946 100644
--- a/airflow/migrations/versions/004c1210f153_increase_queue_name_size_limit.py
+++ b/airflow/migrations/versions/004c1210f153_increase_queue_name_size_limit.py
@@ -29,7 +29,7 @@
 
 # revision identifiers, used by Alembic.
 revision = '004c1210f153'
-down_revision = '74effc47d867'
+down_revision = '939bb1e647c8'
 branch_labels = None
 depends_on = None
 
diff --git a/airflow/migrations/versions/4ebbffe0a39a_merge_heads.py b/airflow/migrations/versions/4ebbffe0a39a_merge_heads.py
index cde8ad64cfc6b..951d7581d664c 100644
--- a/airflow/migrations/versions/4ebbffe0a39a_merge_heads.py
+++ b/airflow/migrations/versions/4ebbffe0a39a_merge_heads.py
@@ -19,14 +19,14 @@
 """Merge heads
 
 Revision ID: 4ebbffe0a39a
-Revises: dd4ecb8fbee3, cf5dc11e79ad, a56c9515abdc
+Revises: dd4ecb8fbee3, cf5dc11e79ad
 Create Date: 2019-02-04 20:19:50.628137
 
 """
 
 # revision identifiers, used by Alembic.
 revision = '4ebbffe0a39a'
-down_revision = ('dd4ecb8fbee3', 'cf5dc11e79ad', 'a56c9515abdc')
+down_revision = ('dd4ecb8fbee3', 'cf5dc11e79ad')
 branch_labels = None
 depends_on = None
 
diff --git a/airflow/migrations/versions/74effc47d867_change_datetime_to_datetime2_6_on_mssql_.py b/airflow/migrations/versions/74effc47d867_change_datetime_to_datetime2_6_on_mssql_.py
index b7b05e9fabd5a..8aac313e392a2 100644
--- a/airflow/migrations/versions/74effc47d867_change_datetime_to_datetime2_6_on_mssql_.py
+++ b/airflow/migrations/versions/74effc47d867_change_datetime_to_datetime2_6_on_mssql_.py
@@ -31,7 +31,7 @@
 
 # revision identifiers, used by Alembic.
 revision = '74effc47d867'
-down_revision = 'b3b105409875'
+down_revision = '6e96a59344a4'
 branch_labels = None
 depends_on = None
 
diff --git a/airflow/migrations/versions/b0125267960b_merge_heads.py b/airflow/migrations/versions/b0125267960b_merge_heads.py
new file mode 100644
index 0000000000000..ee91e236c9c00
--- /dev/null
+++ b/airflow/migrations/versions/b0125267960b_merge_heads.py
@@ -0,0 +1,39 @@
+#
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+"""merge multiple heads
+
+Revision ID: 08364691d074
+Revises: a56c9515abdc, 74effc47d867, b3b105409875, bbf4a7ad0465
+Create Date: 2019-11-19 22:05:11.752222
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '08364691d074'
+down_revision = ('a56c9515abdc', '74effc47d867', 'b3b105409875', 'bbf4a7ad0465')
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    pass
+
+
+def downgrade():
+    pass