PI - IDoc Structure change needs to be transported?

Hi Experts,

If I have a change in the IDoc structure in the development.

When it needs to be transported to the QA / Prod server. Should the IDoc be transported in PI to the QA/Prod server? or The IDoc should be re-imported in the QA/Prod server? or deleting the IDoc metadata in IDX1 at QA/Prod server is enough?

Thank you,

Suwandi C.