(HELP) dragon soul

Hello, I created a new pserver yesterday but there's one problem..
The players can not put a katana soul P7 in the epic ninja's weapon, How do I fix that please??

The item ID of the epic weapon is not the same as a normal katana. You need to change how it checks item IDs and allow it to be applied.

Look at how your server handles applying dragon souls and re-write the code