Make epic tracker with OKR templates

I’m making simple project management app for me, and I think Al Chen’s Simple OKRs suit for me first time.

And later I need to add epics for each KRs, So I add table named EPICS like ORK template did, and make look up to Key Results table.

When I add objective, in Key results table that objective added automatically, but in key results table, I don’t know how to add automatically in epic table. Sorry for my english, I’ll show some images.

It’s Al’s templates. and,

It’s mine that didn’t work.

I’ll leave my doc below. Please Help!