Inherit the filed against attribute value from the parent work item

Hello

when we break down Stories into Tasks, it would be helpful that all the child work items of the Story inherit the filed against attribute value of the parent. It its very error prone, if you have to set the filed against attribute value for each and every child work item separately. It might end up even in a different team area or in a different category group (if you group a view by category) if you miss to set the child work item filed against attribute of the child to be the same as the one of the parent manually and the colleagues will miss the work item in their plan views. 

We know how to set a default value, but we do not know how to inherit the value from the parent when we create the work item and nevertheless override the initial inherited value in the rare cases where it is required.

Thank you for helping out,

Roland