diff --git a/util/migrate/table_ops.py b/util/migrate/table_ops.py
index 83abd630b..634e84287 100644
--- a/util/migrate/table_ops.py
+++ b/util/migrate/table_ops.py
@@ -2,10 +2,12 @@ def copy_table_contents(source_table, destination_table, conn):
   if conn.engine.name == 'postgresql':
     conn.execute('INSERT INTO "%s" SELECT * FROM "%s"' % (destination_table, source_table))
     result = list(conn.execute('Select Max(id) from "%s"' % destination_table))[0]
-    new_start_id = result[0] + 1
-    conn.execute('ALTER SEQUENCE "%s_id_seq" RESTART WITH %s' % (destination_table, new_start_id))
+    if result[0] is not None:
+      new_start_id = result[0] + 1
+      conn.execute('ALTER SEQUENCE "%s_id_seq" RESTART WITH %s' % (destination_table, new_start_id))
   else:
     conn.execute("INSERT INTO `%s` SELECT * FROM `%s` WHERE 1" % (destination_table, source_table))
     result = list(conn.execute('Select Max(id) from `%s` WHERE 1' % destination_table))[0]
-    new_start_id = result[0] + 1
-    conn.execute("ALTER TABLE `%s` AUTO_INCREMENT = %s" % (destination_table, new_start_id))
+    if result[0] is not None:
+      new_start_id = result[0] + 1
+      conn.execute("ALTER TABLE `%s` AUTO_INCREMENT = %s" % (destination_table, new_start_id))