Cloudformation DeletionPolicy policy missing for ec2 instance - amazon-web-services

Question

I am trying to create a stack (see code below)
but I get the following error:
There was an error creating this change set.
The following resources to import [masterinstance] must have DeletionPolicy attribute specified in the template.
I am not sure how to resolve this one. I tried adding "DeletionPolicy": "Retain" under the InstanceType definition, but that's not correct.
"InstanceType": {
"Description": "EC2 instance type for the node instances",
"Type": "String",
"Default": "t3.micro",
"DeletionPolicy": "Retain",
Could somebody explain what I am doing wrong and how can I change the template?
thanks very much.
Template:
{
"AWSTemplateFormatVersion" : "2010-09-09",
"Description" : "Template to create a RHEL8 instances for testings",
"Parameters": {
"instanceName": {
"Description": "The instance name.",
"Type": "String"
},
"Subnet": {
"Description": "The subnets where the instance is created.",
"Type": "AWS::EC2::Subnet::Id"
},
"securitygroup": {
"Description": "The subnets where workers can be created.",
"Type": "List<AWS::EC2::SecurityGroup::Id>"
},
"InstanceType": {
"Description": "EC2 instance type for the node instances",
"Type": "String",
"Default": "t3.micro",
"AllowedValues": [
"t3.micro", "t3.small", "t2.medium"
],
"ConstraintDescription": "Must be a valid EC2 instance type"
},
"KeyName": {
"Description": "The EC2 Key Pair to allow SSH access to the instances",
"Type": "AWS::EC2::KeyPair::KeyName"
},
"volumeSize": {
"Description": "Size of EBS volume in GB",
"Type": "Number"
},
"ami" : {
"Description": "ami of instance",
"Type" : "AWS::EC2::Image::Id",
}
},
"Resources" : {
"masterinstance" : {
"Type" : "AWS::EC2::Instance",
"Properties" : {
"BlockDeviceMappings" : [ {
"DeviceName" : "/dev/sda1",
"Ebs" : {
"DeleteOnTermination" : "False",
"Encrypted" : "False",
"VolumeSize" : {"Ref": "volumeSize"},
"VolumeType" : "gp2"
}
}],
"ImageId" : {"Ref": "ami"},
"InstanceType" : {"Ref" : "InstanceType"},
"KeyName" : {"Ref": "KeyName"},
"SecurityGroupIds" : {"Ref" : "securitygroup"},
"SubnetId" : {"Ref": "Subnet"},
"Tags" : [ {
"Key" : "Name",
"Value" : {"Ref": "instanceName"}
} ]
}
}
}
}

Answer 1

The DeletionPolicy should be placed in your actual instance resource, not input parameter. For example:
"MyEC2Instance" : {
"Type" : "AWS::EC2::Instance",
"DeletionPolicy" : "Retain",
"Properties" : {
"ImageId" : "ami-79fd7eee",
"KeyName" : "testkey",
...