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<@UNF10BDU7> sounds like you are using `awsx`.  I believe that library does currently include some defaults that are probably not appropriate here which may be causing this problem - you could pass `rootBlockDevice: null` and `ebsBlockDevices: null` to `new awsx.autoscaling.AutoScalingLaunchConfiguration` to avoid getting those defaults - does that solve this?

If so - fixing this is part of <https://github.com/pulumi/pulumi-awsx/issues/340> - please do upvote that one.

Hey Luke, unfortunately I cannot do it in typescipt

`Type 'null' is not assignable to type 'LaunchConfigurationRootBlockDevice | Promise&lt;LaunchConfigurationRootBlockDevice&gt; | OutputInstance&lt;LaunchConfigurationRootBlockDevice&gt; | undefined'.`

This solved my problem:
`rootBlockDevice: {`
                `volumeSize: 275,`
                `volumeType: "gp2",`
            `},`

Great - definitely something we need to fix the defaults on - but glad it was possible to get working.