Error while creating routing in CA01

Hi,

I'm trying to create a routing for a material using CA01 in dev environment. I have given the input of a material number and plant that exists in the system, but when i execute it throws an error saying "Material type ZPRD is not defined for task list type N"

Message no. CT761

it suggests with procedure :

To create a task list with task list type N for a material with material type ZPRD, you must maintain the material type allocation under General data in Customizing for routings.

I didn't understand this procedure. Can anyone please help me how to proceed to find the solution.

Appreciated if you can answer.