Solution : https://service.sap.com/sap/support/notes/1253051 (SAP Service marketplace login required)
Key words : 
hkey_local_machine > software > sap > sapgui front > sap frontend server > localdata, symptom firefighter administrator maintains firefighter ids, prerequisites sapgui stores field history, sapgui version 710 patch level 4, terms grc access control, sapgui password field history, stop recording history, /virsa/zvirffpwd-zvirpassword, password field, history values
Related Notes : 
       
| 925639 | History: disable via registry key | 
| 924376 | History: disable history for specific fields in registry |