By shyam2053 on

Hi
I just installed drupal and am testing it out on a site.

I intergrated one of my Invision Board Forums into Drupal.

However, when ever a guest posts something (i.e. as Anonymous) I get this error

user error: Duplicate entry '' for key 2
query: INSERT INTO users (created, changed, uid) VALUES ('1120596972', '1120596972', '494') in /includes/database.mysql.inc on line 66.

warning: Cannot modify header information - headers already sent by (output started at /includes/common.inc:384) in /includes/common.inc on line 192.

How do I rectify this issue? Why does the post appear to be by a new user? They should all be using the same uid.

Any ideas?