Solution : https://service.sap.com/sap/support/notes/783824 (SAP Service marketplace login required)
Key words :
change extras->enhancement category, prerequisites program error, customer enhancement reason, numeric-type fields, enhancement category, structural enhancement, customer include, numeric-type, numeric-type' 2, character-type
Related Notes :
| 783640 | BAPI_TE_REQUISITION_ITEM: Enhancement category not numeric |