Sometimes when we create a new project using the template of the previous project, I want to keep the task schedules (resources scheduled to the tasks) on the new project to avoid the team having to re-schedule resources for similar projects. 

However, I have noticed that the only people who are copied over successfully upon creation of the new project are people are are assigned a role on the Staffing tab.

This team does not use the staffing tab/utilization planning features. Is there a workaround to get the resources to copy over, or would I have to go in and assign roles to all of the “no role” resources on the template project?