Solution : https://service.sap.com/sap/support/notes/1063861 (SAP Service marketplace login required)
Key words :
item 'details' button - enter junk values, item basic data screen, 0 sp02 support package sapkibku02, item basic data - click, 'supplier product number' fields, contract - select 'product category', item category - enter, 'check' button - click, product category - click, product category reason
Related Notes :
| 1064557 | SRM 6.0 SP02: Additional Notes to be applied on SRM Server |