Restrict User to remove Resource from a tab

Summary:

Is there a way to restrict user to remove the resource from a custom tab of Resource. We have a custom resource tab in a custom object, is there a groovy script be written to avoid user to delete a particular resource from the team. The resource which is present on the parent custom object as a dcl cannot be deleted from resource tab.

Content (required):

Tried below code, but it keeps firing all the time. Code is on before update

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