Removing the customerid from the Case form

Good day,

I will like to remove the customerid from the Case form.

I have hidden this field using the properties of the field but onsave ,the form is unable to save saying you need yo first populate the customer.

I have written jscript code to hide this but still this is still the issue.

How can i go about removing the customer id or customer field from the ms crm case.

Hope you are able to assist.

Regards.