URGENT!! Please Help and save my butt!!! Could someone fix this for me PLEASE???

[eluser]Rick Jolly[/eluser]
As bargainph mentioned, autoincrement "topic_id" as it is the primary key. You are using phpmyadmin, so on the "topic_id" row click the pen icon to edit it. Select the autoincrement option of the "Extra" drop-down and save.

Edit: and remove "topic_id" from your insert statement, unless you want to manually set the topic id to a unique value for every insert. In that case, ignore what I wrote about autoincrement.