--- /dev/null
+-- @tag: customer_klass_rename_to_pricegroup_id_and_foreign_key
+-- @description: klass nach pricegroup_id umbenannt
+-- @depends: release_3_4_1
+-- @ignore: 0
+
+ALTER TABLE customer ADD COLUMN pricegroup_id INTEGER REFERENCES pricegroup (id);
+UPDATE customer SET pricegroup_id = klass WHERE klass != 0;
+ALTER TABLE customer DROP COLUMN klass;