Can't Runeforge a weapon with runes

I completed all of the acts runeseeker questlines and discovered that I can upgrade uniques unless it has a rune already socketed. With no warning before hand and no way to remove the rune (even just to destroy it), items like a kulguuran weapon become bricked if the order of operations is done wrong, ruining a hard to get end game weapon. I put 2 divine into crafting mine and now have a weapon at 399 damage instead of around 700. Please allow runeforging to work on socket items with a warning that it will destroy the socketed items or allow removal of socket items without destroying the item they are in.