Convoking Wand Crafting Bug with Hybrid Minion Damage?

Hey,

i found an interesting issue when trying to craft Convoking Wands.
It seems that you are able to craft additional Minion Damage when your wand has an existing Hybrid Minion Damage + Mana Prefix.
T2 of this Mod is called "Prince's" which can have additional Minion Damage crafted on.

T1 of this Mod is called "King's" which appearently cannot have any additional Minion Damage modifier crafted on it.



Is this intended?

Thanks!