//Detect used categories (by category in questions)
$status = execute_sql("INSERT INTO {$CFG->prefix}backup_ids
- (backup_code, table_name, old_id)
- SELECT DISTINCT $backup_unique_code,'question_categories',t.category
+ (backup_code, table_name, old_id, info)
+ SELECT DISTINCT $backup_unique_code,'question_categories',t.category,''
FROM {$CFG->prefix}question t,
{$CFG->prefix}quiz_question_instances g
$from