I think you misunderstand how fix version is intended to work...
Fix version is used to define in what code base your work is placed, i.e. what deployment package. This should not change based on related issues.
However, Jira is open to any way of working so if you want to do this then you probably can use the Automation feature to make that happen. I have not tried it, but it should be possible to trigger a change based on that relation.
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