What record should i set my primary key to ?
Sorry, but the question makes no sense.
Every record in the table should have a Primary Key. This is one field (or
more than one, up to ten fields) which uniquely identifies the record: only
one record in the table can have that value of the PK. It also must be
non-Null.
Could you explain the current structure of your table, and just what it is
that you are trying to accomplish?