Migrate to @aws-cdk/aws-lambda:useCdkManagedLogGroup: true

[MurraySpeight]

Is there a documented process to migrate over to using the flag @aws-cdk/aws-lambda:useCdkManagedLogGroup: true

When I turn this on in a stack already deployed I get errors that the log group already exists. If I delete the log group and try again then I get errors relating to the metrics filter not being found.

"Resource of type 'AWS::Logs::LogGroup' with identifier '{"/properties/LogGroupName":"/aws/lambda/my-stack-name-MyLambda-abcdef12345"}' already exists."

This flag seems valuable to have turned on but it seems difficult to migrate over to.