SQL error when deleting an item from the plan

When deleting an item from a plan, you get this sql error:

PDOException: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'plan' in 'where clause': DELETE FROM {deploy_manager_entities} WHERE (entity_type = :db_condition_placeholder_0) AND (entity_id = :db_condition_placeholder_1) AND (plan = :db_condition_placeholder_2) ; Array ( [:db_condition_placeholder_0] => node [:db_condition_placeholder_1] => 7 [:db_condition_placeholder_2] => test_plan ) in deploy_manager_delete_from_plan() (line 124 of /Users/henrique/Dropbox/Workspace/deploy/deploy.manager.inc).