diff --git db/migrate/20160416072926_remove_position_defaults.rb db/migrate/20160416072926_remove_position_defaults.rb
index ab3af1499..690dcac69 100644
--- db/migrate/20160416072926_remove_position_defaults.rb
+++ db/migrate/20160416072926_remove_position_defaults.rb
@@ -1,6 +1,7 @@
 class RemovePositionDefaults < ActiveRecord::Migration
   def up
     [Board, CustomField, Enumeration, IssueStatus, Role, Tracker].each do |klass|
+      schema_cache.clear_table_cache!(klass.table_name)
       change_column klass.table_name, :position, :integer, :default => nil
     end
   end