Metin2 skillbook chest problem

[Unreconstructed 0]

Hello. I've modified chest ID 38050 so that it only drops the skill book 50300.
The skill book in the item proto is stackable.
When I pick up the book from the ground, the items stack properly.
But when I open chests, they don't.  What can i do or check?

 

Video: 

 

[KolenMG 1105]

you need a server source change in regards of skillbooks. because despite being stackable, if you will try to read from a stack the entire stack will be consumed

[Unreconstructed 0]

Yes i know. But most important at the moment for me. Is stackable thing

 

[Unreconstructed 0]

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