Solution : https://service.sap.com/sap/support/notes/136628 (SAP Service marketplace login required)
Key words : 
directory ftp/general/3rdparty/oracle/aix/8, additional key words f4, -mentioned case exists, foreign key dependencies, called rqeva-grund, field called grund, oracle bug 779000, foreign key, additional field, pressed f4
Related Notes : 
       
| 136709 | Usage decision: F4, reasn, ret.delivry: no val.ret. | 
| 99311 | Current patch set 8.0.4.X |