SQL error when adding term to quiz

When trying to add an existing term to a Quiz I defined (with 'Randomize questions' set to 'Categorized random questions') a couple of errors are reported, and the quiz_terms record is not created.

The errors are the following:

1. user warning: Field 'weight' doesn't have a default value query: INSERT INTO quiz_terms (nid, vid, tid, max_score, number) VALUES (57, 97, 1, 1, 1) in \includes\common.inc on line 3538.
2. user warning: Column 'max_score' cannot be null query: UPDATE quiz_node_properties qnp SET max_score = max_score_for_random * number_of_random_questions + ( SELECT SUM(max_score) FROM quiz_node_relationship qnr WHERE qnr.question_status = 1 AND parent_vid = qnp.vid ) WHERE vid IN( 97) in \sites\\modules\quiz\quiz.module on line 2380.
3. user warning: Column 'max_score' cannot be null query: UPDATE quiz_node_properties qnp SET qnp.max_score = ( SELECT SUM(qt.max_score * qt.number) FROM quiz_terms qt WHERE qt.nid = qnp.nid AND qt.vid = qnp.vid ) WHERE qnp.randomization = 3 AND qnp.vid IN( 97) in \sites\\modules\quiz\quiz.module on line 2388.

System info:

• Drupal 6.22
• Windows Server2003
• IIS v6.0
• PHP 5.2.6
• Mysql 5.1.44-community

Please let me know if you need more info.
Thanks,
Guno