diff --git a/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/045_placeholder.py b/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/045_placeholder.py
new file mode 100644
index 000000000..a5d6ecd3a
--- /dev/null
+++ b/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/045_placeholder.py
@@ -0,0 +1,23 @@
+
+#    Licensed 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.
+
+# This is a placeholder for backports.
+# Do not use this number for new work.  New work starts after
+# all the placeholders.
+#
+# See this for more information:
+# http://lists.openstack.org/pipermail/openstack-dev/2013-March/006827.html
+
+
+def upgrade(migrate_engine):
+    pass
diff --git a/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/046_placeholder.py b/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/046_placeholder.py
new file mode 100644
index 000000000..a5d6ecd3a
--- /dev/null
+++ b/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/046_placeholder.py
@@ -0,0 +1,23 @@
+
+#    Licensed 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.
+
+# This is a placeholder for backports.
+# Do not use this number for new work.  New work starts after
+# all the placeholders.
+#
+# See this for more information:
+# http://lists.openstack.org/pipermail/openstack-dev/2013-March/006827.html
+
+
+def upgrade(migrate_engine):
+    pass
diff --git a/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/047_placeholder.py b/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/047_placeholder.py
new file mode 100644
index 000000000..a5d6ecd3a
--- /dev/null
+++ b/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/047_placeholder.py
@@ -0,0 +1,23 @@
+
+#    Licensed 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.
+
+# This is a placeholder for backports.
+# Do not use this number for new work.  New work starts after
+# all the placeholders.
+#
+# See this for more information:
+# http://lists.openstack.org/pipermail/openstack-dev/2013-March/006827.html
+
+
+def upgrade(migrate_engine):
+    pass
diff --git a/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/048_placeholder.py b/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/048_placeholder.py
new file mode 100644
index 000000000..a5d6ecd3a
--- /dev/null
+++ b/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/048_placeholder.py
@@ -0,0 +1,23 @@
+
+#    Licensed 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.
+
+# This is a placeholder for backports.
+# Do not use this number for new work.  New work starts after
+# all the placeholders.
+#
+# See this for more information:
+# http://lists.openstack.org/pipermail/openstack-dev/2013-March/006827.html
+
+
+def upgrade(migrate_engine):
+    pass
diff --git a/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/049_placeholder.py b/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/049_placeholder.py
new file mode 100644
index 000000000..a5d6ecd3a
--- /dev/null
+++ b/nova/db/sqlalchemy/api_migrations/migrate_repo/versions/049_placeholder.py
@@ -0,0 +1,23 @@
+
+#    Licensed 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.
+
+# This is a placeholder for backports.
+# Do not use this number for new work.  New work starts after
+# all the placeholders.
+#
+# See this for more information:
+# http://lists.openstack.org/pipermail/openstack-dev/2013-March/006827.html
+
+
+def upgrade(migrate_engine):
+    pass