i believe this has been answered before. but for anyone wondering where to look:
db/pre-re/item_db.txt (for pre-renewal)
db/re/item_db.txt (for renewal)
if that doesn't work try your SQL database, it should be in your item_db table and should look like this:
arrow_id_here,arrow_name,,10,,200,10,,0,0xFFFFFFFF,7,2,34,,0,1,,{},{},{}
This line shows what jobs can equip items/arrows.
Check the Job code/bitmask of the item, make sure the code includes Novice which is 0x00000001.
i hope this helps.