Control Tower Update Failure - Delete delivery Channels - Still fails

Hello,

We are trying to add a region to our landing zone settings. We wanted to add California as one of our governed zones.

We modified the landing zone set leaving everything the same except adding California under region configuration. We hit update and got an error.

We got the error "AWS Control Tower failed to completely set up your landing zone: AWS Control Tower cannot create an AWS Config delivery channel because one already exists. To continue, delete the existing delivery channel and try again."

We proceeded by stopping the configuration recorder and deleting all delivery channel and configuration records using CLI in all accounts in all regions.

aws configservice stop-configuration-recorder --configuration-recorder-name [RECORD NAME]
aws configservice delete-delivery-channel --delivery-channel-name [DELIVER CHANNEL NAME]
aws configservice delete-configuration-recorder --configuration-recorder-name [RECORD NAME]

I retried updating the landing zone, which failed again with the same error message.

We set up our Control tower is 03/2023. We have enabled other dependent resources like Security Hub, Macie, Guard duty, and other resource-dependent solutions. If we cannot add the California region, how can we revert to our original landing zone setting?

Any advice?

Thanks,