How to generate unique create Customer id and Vendor Id separately?

How to generate unique create Customer id and Vendor Id separately?

Hello Forum,

I need to create Customer id and Vendor Id seperate. But under settings>preferences. customers& vendors are placed under one single click. so if i add a custom field. the auto generate number does not generate separate series for customers and vendors, rather it doing combined.

Any way to resolve this ? Kindly tell