Solution : https://service.sap.com/sap/support/notes/1585627 (SAP Service marketplace login required)
Key words : 
software component   sap_hrcde                      sap hr germany, release 470          sapk-470c0insaphrcde - sapk-470c4insaphrcde, release 500          sapk-50086insaphrcde - sapk-50090insaphrcde, release 600          sapk-60069insaphrcde - sapk-60073insaphrcde, release 604          sapk-60435insaphrcde - sapk-60439insaphrcde, function 'manually answered' allowed, manual pre-implement, symptom zknn notifications, relevant support package, attached correction instructions
Related Notes : 
       
| 1020600 | ZFA: Kinderdaten-Überprüfungsverfahren |