Solution : https://service.sap.com/sap/support/notes/371902 (SAP Service marketplace login required)
Key words :
system generates error message v2402, order-relevant billing - billing plan, additional key words fkrel, maintain billing plan type, assigned billing plan type, attached correction program zzfkrel, change field vbap-fkrel, error message v2402, billing plan type, avoid double billing
Related Notes :
429120 | Collective note: Correction reports for SD-BIL |
209814 | Statistical items in the billing plan |