The description on the Rock-Temple of Nabia says that it upgrades light and heavy weapons, which it does not.

The reason is an error in edb.

After the heading

"temple_of_fun_awesome_temple ..."

the lines

weapon_simple 1 requires factions { spain, }
weapon_bladed 1 requires factions { spain, }

should be

weapon_simple bonus 1 requires factions { spain, }
weapon_bladed bonus 1 requires factions { spain, }

cheers

Gerhard