Ensuring Accurate School Account Setup: Resolving Missing Unique Reference Numbers And Preventing Future Errors

Can someone answer this for me, I’m currently learning how to best resolve issues in data-setups: “You have been working through account set up on the platform for a number of schools. After completing the set up for the majority of schools you realise you have forgotten to manually enter each school’s unique reference number. This creates the risk that some school users may have been assigned to the wrong school. What steps would you take to resolve this issue, and ensure it didn’t happen again?”