How to disable parent column move without affecting child column move in AGgrid 31

Is there anyway to disable parent column move, without affecting child column move? I need to disable only parent column move, i am using aggrid 31 with angular 18

i tried suppressMovable:true for children but its disable column movement for parent and children example: https://codesandbox.io/p/sandbox/lock-visible-forked-kqyz8v?file=/main.ts:27,27

Thanks

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