Shortest long-term contract ever

About a week ago Gino ended his trial period, and he got a long term contract. Not because we wanted to give it to him, but purely by mistake. He seemed very happy about it, so I got into action, called the HR dept. and made them close the long term contract and issue a short and low pay contract in place. Gino could easily make the company pay a huge amount of money for the contract breach, but of course we easily made him believe that the change was in his favour, even the lowering of wage.