When we update an order, will the reference number change?

Hello，we are designing the system based on your company's API and we want to ask a question about the "order update".

For example, on the first day, the customer should pay 1000MXN, he got the reference but did not pay it in OXXO successfully.
And for the next, we will have some punishment for this customer and the repayment amount is 1200MXN.
Then I need to update the order's amount from 1000MXN to 1200MXN.
Therefore, in this case, I am sure the order id won't change. However, will the reference number change when the order is updated?