I would warn against that major downgrade to 1.6.31, it will force open and expose your computer(s) to hundreds of now fixed security holes. The solution to check "disable security warning" is really not insecure, according to (rather unclear) Oracle specifications on the issue - which indicate that the warning is really there "to help developers use best practice".
Oracle sends this problem right back at you, SAP!
Please start the solution immidately, communicating with ORACLE and your customers please!