The error message "athenaidx user is not authorized to overbook" typically indicates a permission issue within the Amazon Athena or AWS Glue environments. This error suggests that the user attempting the operation does not have the necessary IAM (Identity and Access Management) permissions to overbook resources or execute specific actions related to Athena indexing. To resolve this, the user should review their IAM policies, ensure they have the correct permissions for Athena operations, and verify any service-linked roles that might be restricting access athenaidx user is not authorized to overbook. Additionally, checking AWS CloudTrail logs can help identify the root cause of the authorization failure.