diff --git a/nova/api/openstack/compute/legacy_v2/contrib/admin_actions.py b/nova/api/openstack/compute/legacy_v2/contrib/admin_actions.py
index 19d0043d7866..ebd3c43e80e1 100644
--- a/nova/api/openstack/compute/legacy_v2/contrib/admin_actions.py
+++ b/nova/api/openstack/compute/legacy_v2/contrib/admin_actions.py
@@ -333,8 +333,7 @@ class AdminActionsController(wsgi.Controller):
                 exception.InvalidLocalStorage,
                 exception.InvalidSharedStorage,
                 exception.HypervisorUnavailable,
-                exception.MigrationPreCheckError,
-                exception.LiveMigrationWithOldNovaNotSafe) as ex:
+                exception.MigrationPreCheckError) as ex:
             raise exc.HTTPBadRequest(explanation=ex.format_message())
         except exception.InstanceNotFound as e:
             raise exc.HTTPNotFound(explanation=e.format_message())
diff --git a/nova/api/openstack/compute/migrate_server.py b/nova/api/openstack/compute/migrate_server.py
index b1f4a5e70299..d2633a11e02a 100644
--- a/nova/api/openstack/compute/migrate_server.py
+++ b/nova/api/openstack/compute/migrate_server.py
@@ -103,7 +103,6 @@ class MigrateServerController(wsgi.Controller):
                 exception.InvalidSharedStorage,
                 exception.HypervisorUnavailable,
                 exception.MigrationPreCheckError,
-                exception.LiveMigrationWithOldNovaNotSafe,
                 exception.LiveMigrationWithOldNovaNotSupported) as ex:
             raise exc.HTTPBadRequest(explanation=ex.format_message())
         except exception.InstanceIsLocked as e:
diff --git a/nova/conductor/manager.py b/nova/conductor/manager.py
index ccdc457a8d2e..707b98ddec52 100644
--- a/nova/conductor/manager.py
+++ b/nova/conductor/manager.py
@@ -172,7 +172,6 @@ class ComputeTaskManager(base.Base):
         exception.HypervisorUnavailable,
         exception.InstanceInvalidState,
         exception.MigrationPreCheckError,
-        exception.LiveMigrationWithOldNovaNotSafe,
         exception.LiveMigrationWithOldNovaNotSupported,
         exception.UnsupportedPolicyException)
     def migrate_server(self, context, instance, scheduler_hint, live, rebuild,
@@ -320,7 +319,6 @@ class ComputeTaskManager(base.Base):
                 exception.HypervisorUnavailable,
                 exception.InstanceInvalidState,
                 exception.MigrationPreCheckError,
-                exception.LiveMigrationWithOldNovaNotSafe,
                 exception.LiveMigrationWithOldNovaNotSupported,
                 exception.MigrationSchedulerRPCError) as ex:
             with excutils.save_and_reraise_exception():
diff --git a/nova/exception.py b/nova/exception.py
index 40b82bf58345..d250c49e8334 100644
--- a/nova/exception.py
+++ b/nova/exception.py
@@ -1869,12 +1869,6 @@ class NoLiveMigrationForConfigDriveInLibVirt(NovaException):
                 "drive data is shared across compute nodes.")
 
 
-class LiveMigrationWithOldNovaNotSafe(NovaException):
-    msg_fmt = _("Host %(server)s is running an old version of Nova, "
-                "live migrations involving that version may cause data loss. "
-                "Upgrade Nova on %(server)s and try again.")
-
-
 class LiveMigrationWithOldNovaNotSupported(NovaException):
     msg_fmt = _("Live migration with API v2.25 requires all the Mitaka "
                 "upgrade to be complete before it is available.")
diff --git a/nova/tests/unit/api/openstack/compute/test_migrate_server.py b/nova/tests/unit/api/openstack/compute/test_migrate_server.py
index 5c3663329787..2d00de42db80 100644
--- a/nova/tests/unit/api/openstack/compute/test_migrate_server.py
+++ b/nova/tests/unit/api/openstack/compute/test_migrate_server.py
@@ -264,10 +264,6 @@ class MigrateServerTestsV21(admin_only_action_common.CommonTests):
         self._test_migrate_live_failed_with_exception(
             exception.MigrationPreCheckError(reason=''))
 
-    def test_migrate_live_migration_with_old_nova_not_safe(self):
-        self._test_migrate_live_failed_with_exception(
-            exception.LiveMigrationWithOldNovaNotSafe(server=''))
-
     def test_migrate_live_migration_with_unexpected_error(self):
         self._test_migrate_live_failed_with_exception(
             exception.MigrationError(reason=''),
diff --git a/nova/tests/unit/conductor/test_conductor.py b/nova/tests/unit/conductor/test_conductor.py
index b74ff97b9232..3b3dde144f96 100644
--- a/nova/tests/unit/conductor/test_conductor.py
+++ b/nova/tests/unit/conductor/test_conductor.py
@@ -1300,7 +1300,6 @@ class ConductorTaskTestCase(_BaseTaskTestCase, test_compute.BaseTestCase):
                                         state='', method=''),
                exc.DestinationHypervisorTooOld(),
                exc.HypervisorUnavailable(host='dummy'),
-               exc.LiveMigrationWithOldNovaNotSafe(server='dummy'),
                exc.LiveMigrationWithOldNovaNotSupported(),
                exc.MigrationPreCheckError(reason='dummy'),
                exc.InvalidSharedStorage(path='dummy', reason='dummy'),