If i add fortitude to this weapon will i lose any of the upgrades?

The weapon is Kepkhets Refgue.

Energy +10
Energy +5
Enchaments last 20% longer
Halves casting time 20%
Hales recharge time 20%


If i add fortitude for health, will i lose any of thoes upgrades on the staff?

You cannot add upgrades to green items. They're set in stone the way they are. However, if this were a gold, not a green, it would indeed replace the 20% longer enchantments.

You can't upgrade green items, but if it wasn't green, yes it would replace either the energy +5 or the 20% longer enchants.

For future Reference for White/Blue/Purple/Gold items:

"Of [Anything]" ALWAYS replaces the suffix if their is one.

Of course you've been told that Green items like your refuge cant be modded, but assuming it was Gold, It'd be called "Insightful Protective Staff of Enchanting", and your "of Fortitude" would replace the "of Enchanting"