Setting up Centralised Backups when using TSE-SE LZA

Hi, We are trying to set up Central Backups in our org as per the guidance, https://aws.amazon.com/blogs/storage/build-centralized-cross-region-backup-architecture-with-aws-control-tower/

We've used TSE-SE LZA version 1.11.0-a aws-samples/landing-zone-accelerator-on-aws-for-tse-se at release/v1.11.0-a

We've set up Central Backup account and Backup Administrator accounts via Control Tower. We have managed to complete step 4, however when we try to enable backups for each OU, we are getting the following error,

“AWS Control Tower could not apply Service Control Policies for organizational unit <ou> because the OU has maximum number of SCPs. To continue, delete some existing policies or combine them.”

Here are the SCPs that are attached to our Security OU,

• AWSAccelerator-Guardrails-Part-1 • aws-guardrails-GZpdKg – “This policy and the contents implement controls, managed by AWS Control Tower. Do not modify, delete, or detach this policy from any target, or attach it to any target, with the AWS Organizations console or APIs. To modify these controls, you must utilize AWS Control Tower.” • AWSAccelerator-Guardrails-Part-0-Core • aws-guardrails-rvZyuy - “This policy and the contents implement controls, managed by AWS Control Tower. Do not modify, delete, or detach this policy from any target, or attach it to any target, with the AWS Organizations console or APIs. To modify these controls, you must utilize AWS Control Tower.” • FullAWSAccess – listed twice

Has anyone who are using TSE-SE LZA be able to set up CentralBackup, DataBunker and BackupAdministrator Accounts and enable Backup Service? If so, appreciate any pointers to overcome this issue.