remove a separate foreign key column
remove a separate foreign key column

emrojo/unified_warehouse,sanger/unified_warehouse,JamesGlover/event_warehouse,JamesGlover/event_warehouse,sanger/barcode_warehouse,emrojo/unified_warehouse,sanger/event_warehouse,sanger/barcode_warehouse,sanger/event_warehouse,JamesGlover/unified_warehouse,sanger/event_warehouse,JamesGlover/unified_warehouse,JamesGlover/event_warehouse,sanger/unified_warehouse,emrojo/unified_warehouse,sanger/barcode_warehouse