how to run interim checks after final payroll of year?

We have a situation where an employee was only paid for 1 week for our last payroll of the year.  We want to issue an interim check to pay them the for 1 more week.  The payroll we just finalized is the last payroll of the year so if we do an interim check we want to make sure the pay is for 2019.  Payroll is worried that if they run an interim now that it will go to 2020.  Payroll thinks that they could do the process the interim then run another "mini" payroll but they aren't sure how