DROP TABLE IF EXISTS workbench_knowledge_version_aliases;
DROP TABLE IF EXISTS workbench_knowledge_version_jobs;
ALTER TABLE workbench_resource_submissions DROP COLUMN IF EXISTS published_id;
ALTER TABLE workbench_resource_submissions DROP COLUMN IF EXISTS snapshot_id;
ALTER TABLE workbench_resource_forks DROP COLUMN IF EXISTS status;
ALTER TABLE knowledge_bases DROP COLUMN IF EXISTS version_state;