[Forums] Primary Keys on the Database

Is there a  way to drop the ID AutoIncrement and define a different primary key?

So here is mny issue.  I have two tables with data and we use CASE_ID to tie these tables together.  When I cretae the new data entities I get the ID auto increment primary key.  I want to remove that primary key and define the primary key using CASE_ID.

Thanks 

John