I am using the Universal Code, not the WordPress plugin. I used the "vanilla_discussion_id" variable and assigned it to discussion id number. However, when I added a new comment for the first time, it created a new discussion instead of using the discussion I assigned.
Is anyone else having this problem?
I looked at the database and it seems that it can only use the "vanilla_identifier" variable which maps to the "ForeignID" column in the "GDN_Discussion" table.
On a side note, I had no problems mapping to an existing category with the "vanilla_category_id" variable.