Error creating SpotFleet using CloudFormation - amazon-web-services

Question

I'm creating a SpotFleet request using CloudFormation, but whenever I try to deploy it, fails with the message:
Unable to fetch parameters [ami-09bee01cc997a78a6] from parameter store for this account.
I'm using the following code (snippet):
SpotFleet:
Type: AWS::EC2::SpotFleet
Properties:
SpotFleetRequestConfigData:
ExcessCapacityTerminationPolicy: default
InstanceInterruptionBehavior: terminate
IamFleetRole: !GetAtt SpotFleetRole.Arn
TargetCapacity: !Ref ClusterSize
TerminateInstancesWithExpiration: false
LaunchSpecifications:
- IamInstanceProfile:
Arn: !Ref ECSInstanceProfile
ImageId: !Ref LatestAmiId
InstanceType: !Ref SpotFleetInstanceType
KeyName: !Ref KeyName
Monitoring:
Enabled: false
SecurityGroups:
- GroupId: !Ref ECSHostSecurityGroup
SubnetId: !Ref PublicSubnet
...
The ImageId is:
LatestAmiId:
Type: AWS::SSM::Parameter::Value<AWS::EC2::Image::Id>
Default: '/aws/service/ecs/optimized-ami/amazon-linux-2/recommended/image_id'
When I manually fetch the image id from the AWS CLI I get:
aws ssm get-parameters --names /aws/service/ecs/optimized-ami/amazon-linux-2/recommended/image_id --region us-east-1 --output json | jq -r ."Parameters[].Value"
Output:
ami-09bee01cc997a78a6
If a manually hardcode this value into the ImageId parameter, it returns the same error (Unable to fetch parameters...)
Why it is failing if I am able to fetch the id value from the CLI?

Answer 1

Thanks to #Marcin's comment and this answer, I found the problem.
The problem is that I was using the wrong parameter type for the Image Id. I was using:
LatestAmiId:
Type: AWS::SSM::Parameter::Value<AWS::EC2::Image::Id>
Default: '/aws/service/ecs/optimized-ami/amazon-linux-2/recommended/image_id'
and I should be using this:
LatestAmiId:
Description: Linux AMI
Type: AWS::EC2::Image::Id