I have an employee that has a contract on file for a part time position from Jan 2010, who has since changed locations, and moved to a FT position. The company is having this employee change positions as a summer employee under part time status, can

I have an employee that has a contract on file for a part time position from Jan 2010, who has since changed locations, and moved to a FT position. The company is having this employee change positions as a summer employee under part time status, can we use the old contract on file?