Solution : https://service.sap.com/sap/support/notes/67366 (SAP Service marketplace login required)
Key words :
additional key words work item, original work item tables, work item types, work item type, respective work items, function module sww_wi_delete_s, 0d standard system, special tables, type check, -mentioned types
Related Notes :
| 49545 | Deleting unnecessary work items |