AWS CopilotCLIエラー 「作成したenvが削除できない」

Only found one application, defaulting to: sawata-aws-container
What is your environment's name? [環境名]
Which credentials would you like to use to create [環境名]? [profile default]
Would you like to use the default configuration for a new environment?
    - A new VPC with 2 AZs, 2 public subnets and 2 private subnets
    - A new ECS Cluster
    - New IAM Roles to manage services and jobs in your environment
No, I'd like to import existing resources
Which VPC would you like to use? [VPC ID]
✘ No existing public subnets were found in VPC [VPC ID]. You can either:
- Create new public subnets and then import them.
- Use the default Copilot environment configuration.✘ select public subnets: no existing subnets found

- Create new public subnets and then import them.
- Use the default Copilot environment configuration.✘ select public subnets: no existing subnets found

$copilot env delete   

Only found one application, defaulting to: sawata-aws-container
Which environment would you like to delete? test
X Sorry, your reply was invalid: " y" is not a valid answer, please try again.
Are you sure you want to delete environment test from application sawata-aws-container ? Yes
✘ find service cloudformation stacks: AccessDenied: User: arn:aws:iam::[アカウントID]:user/[IAM User name] is not authorized to perform: sts:AssumeRole on resource: arn:aws:iam::504252798833:role/sawata-aws-container-test-EnvManagerRole
        status code: 403, request id: 2e11f525-bc96-4f0b-ab5b-4153c4b335d2
salt@SALTiMac TsunaRhythm % copilot env delete
Only found one application, defaulting to: sawata-aws-container
Which environment would you like to delete? test
Are you sure you want to delete environment test from application sawata-aws-container ? Yes
✘ find service cloudformation stacks: AccessDenied: User: arn:aws:iam::[アカウントID]:user/sawata-aws-user is not authorized to perform: sts:AssumeRole on resource: arn:aws:iam::[アカウントID]:role/sawata-aws-container-test-EnvManagerRole
        status code: 403, request id: a81d5f11-aa30-418a-bc57-a89b85762070

{
    "Version": "2012-10-17",
    "Statement": [
        {
            "Effect": "Allow",
            "Action": "sts:AssumeRole",
            "Resource": "arn:aws:iam::504252798833:role/sawata-aws-container-prod-EnvManagerRole"
        }
    ]
}