Solution : https://service.sap.com/sap/support/notes/312603 (SAP Service marketplace login required)
Key words :
additional key words variants, function module rs_variant_change, sap& variant, program error, rs_variant_change, duplicated, prerequisites
Related Notes :
| 303245 | COOIS: Standard variants preselected, damaged |
| 303224 | COOIS: Fields are not saved with variant |