AWS-Generated Cost Allocation Tag Restrictions
The following restrictions apply to the AWS-generated tag:
You can't update, edit, or delete AWS tags.
AWS-generated cost allocation tags are not applied to resources that were created before the tag was activated.
Maximum active tag keys for Billing and Cost Management reports: 500.
AWS-generated tag are created using CloudTrail logs. CloudTrail logs over a certain size cause AWS-generated tag creation to fail.
AWS-generated tag names and values are automatically assigned the
aws:prefix, which the you cannot assign. AWS-generated tag names do not count towards the tag limit of 50. User-defined tag names have the prefix
user:in the Cost Allocation Report.