Solution : https://service.sap.com/sap/support/notes/80505 (SAP Service marketplace login required)
Key words :
check table fld foreign key field genericcepc datbi t076k databafter, check table fld foreign key field genericcepc datbi, call transaction se11 --> enter t076k --> choose 'change' 2, foreign key field type, check table cepc, additional key words obcc, activate tables t076k, 'foreign keys' icon 4, -key-fields/candidates, key fields/candidates
Related Notes :
| 142642 | ALE inbound invoices FI:collective note f. INVOIC |