Hi , I had signed a Tuition sponsorship agreement in Massachussets

Hi , I had signed a Tuition sponsorship agreement in Massachussets. The company paid my tuition fees for my masters degree. In the agreement, it is stated that I agreed to be an employee for 5 years after graduation. Now they want me to sign a new tuition reimbursement contract which states that I need to pay the whole money plus 5 % CI. The reason for the repayment is I decided not to sign the job offer. The contract also states: I indemnifies and saves harmless the XY company from and against any and all suits, claims, actions, damages and other losses which XY company suffers or incurs as a result of any governement authority assessing the reimbursement of tuition payment hereunder as a benefit to me.

what should I do to protect myself ?