Used regal equipment bench in the vaal temple and it changed the existing mods on the gear

Title says it all. Went to make a magic item rare in the temple using the equipment bench. Instead of adding one extra mod, the item ended up with 4 mods, but the two existing mods were different. Bricked my item :(

Other than that, loving the druid :)

That wasnt a regal bench. It was an Alchemy bench. Its like applying an Alchemy orb, which overrides the one or two existing mods and give you 4 random new ones