Small Code edit to Productivity App

Hi, We have an app that gives rewards for completing tasks. When scheduling my tasks, each reward can only be awarded to one task at a time. Let's say I have five rewards A, B, C, D and E. And I have five tasks. I can only set one reward i.e. A, B, C, D or E when scheduling each of the five tasks. I want to be able to have each reward be able to be awarded to multiple tasks at the same time. For instance, I want to be able to set "reward A" to all five tasks. Currently until the task that has "reward A" is complete, I can only assign reward A to one task. Please put "Raven" in the response to know that you have read this fully. Please provide reference work. I can send additional data if needed. requirement to provide ipa file so that I can test