Solution : https://service.sap.com/sap/support/notes/212174 (SAP Service marketplace login required)
Key words : 
additional key words mmreo050, marc entry physically, incorrect bom usage, find bom usages, parameters deletion ='x', 'corrections' --> 'correction instructions', create bom items, bom headers, bom history, deletion mode
Related Notes : 
       
| 308629 | MM_MATNR: Test for BOM usage | 
| 215970 | Bill of material: Delete dead items |