weapon can't use philosopher's stone(LV100-124)

[fishguy]

i had 105LV MusketL31 (gun), and i try to use philosopher's stone(LV100-124)...However, its not work.

 

System said:

The item cannot be granted an option or is not for your level!!

 

please to amend ASAP

 

THX

[LEGACYOFGOD]

bug maybe?
musket no have stat. 

from craft n philo.