diff --git a/CHANGELOG.md b/CHANGELOG.md
index 170702c6a6..ff5b43b0b3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,7 @@
 # Changelog
 
+* `#2459` Squashed old migrations
+
 ## 1.0.1.pre1
 
 * `#1797` Adaptions to Migration of DTAG Customizing
diff --git a/db/migrate/001_sti_for_roles.rb b/db/migrate/001_sti_for_roles.rb
deleted file mode 100644
index 96ab4bb5d9..0000000000
--- a/db/migrate/001_sti_for_roles.rb
+++ /dev/null
@@ -1,34 +0,0 @@
-#-- copyright
-# OpenProject is a project management system.
-#
-# Copyright (C) 2010-2013 the OpenProject Team
-#
-# This program is free software; you can redistribute it and/or
-# modify it under the terms of the GNU General Public License version 3.
-#
-# See doc/COPYRIGHT.rdoc for more details.
-#++
-
-class StiForRoles < ActiveRecord::Migration
-  def self.up
-    add_column :roles, :type, :string, :limit => 30, :default => "Role"
-
-    ActiveRecord::Base.connection.execute("UPDATE roles SET type='Role';")
-
-    create_table :principal_roles, :force => true do |t|
-      t.column :role_id, :integer, :null => false
-      t.column :principal_id, :integer, :null => false
-      t.timestamps
-    end
-
-    add_index :principal_roles, :role_id
-    add_index :principal_roles, :principal_id
-  end
-
-  def self.down
-    remove_column :roles, :type
-    remove_index :principal_roles, :role_id
-    remove_index :principal_roles, :principal_id
-    drop_table :principal_roles
-  end
-end
\ No newline at end of file
diff --git a/db/migrate/20100528100562_aggegated_global_roles_migrations.rb b/db/migrate/20100528100562_aggegated_global_roles_migrations.rb
new file mode 100644
index 0000000000..2db0bd3c05
--- /dev/null
+++ b/db/migrate/20100528100562_aggegated_global_roles_migrations.rb
@@ -0,0 +1,43 @@
+require Rails.root.join("db","migrate","migration_utils","migration_squasher").to_s
+require 'open_project/plugins/migration_mapping'
+# This migration aggregates the migrations detailed in MIGRATION_FILES
+class AggregatedGlobalRolesMigrations < ActiveRecord::Migration
+
+
+  MIGRATION_FILES = <<-MIGRATIONS
+    001_sti_for_roles.rb
+  MIGRATIONS
+
+  OLD_PLUGIN_NAME = "redmine_global_roles"
+
+  def up
+    migration_names = OpenProject::Plugins::MigrationMapping.migration_files_to_migration_names(MIGRATION_FILES, OLD_PLUGIN_NAME)
+    Migration::MigrationSquasher.squash(migration_names) do
+      add_column :roles, :type, :string, :limit => 30, :default => "Role"
+
+      ActiveRecord::Base.connection.execute("UPDATE roles SET type='Role';")
+
+      Role.reset_column_information
+
+      create_table :principal_roles do |t|
+        t.column :role_id, :integer, :null => false
+        t.column :principal_id, :integer, :null => false
+        t.timestamps
+      end
+
+      add_index :principal_roles, :role_id
+      add_index :principal_roles, :principal_id
+    end
+  end
+
+  def down
+    remove_column :roles, :type
+    remove_index :principal_roles, :role_id
+    remove_index :principal_roles, :principal_id
+    drop_table :principal_roles
+    Role.reset_column_information
+  end
+end
+
+
+