Craft problem

As you can see, item also has one suffix space. here I want to add the bullet mod that increased Projectile Attack Damage during any Flask Effect. but it gives me a warning like this.there are no valid mods for this craft on this item. I'm trying to add attack mode but it doesn't allow

i would bet that the 2 mods

'increased melee damage during flask effect'
'increased projectile damage during flask effect'

are in the same mod group, meaning you can only have 1 of them on an item.