Npc with CONVERSATION_PRIVATE OTserver 7.72 (help)

[Loremaster7]

Good afternoon friends,

After a long time without working with it, I decided to stick a guy in an old school project and I would like to implement the style of talking with NPC present from version 8.2, the one where the NPC only talks to you and this allows the NPC to talk with more than one person simultaneously.

But I'm stuck and would like to know how it's done in version 7.72...

I tested some things ... I've tested a few things ... for example changing functions in .lua files

in the npchandler.lua,

This:
-- Currently applied conversation behavior. CONVERSATION_DEFAULT is default.
NPCHANDLER_CONVBEHAVIOR = CONVERSATION_DEFAULT

for:
-- Currently applied conversation behavior. CONVERSATION_DEFAULT is default.
NPCHANDLER_CONVBEHAVIOR = CONVERSATION_PRIVATE

and, in the npcsystem.lua,

This:
NPCHANDLER_CONVBEHAVIOR = CONVERSATION_DEFAULT

for:
NPCHANDLER_CONVBEHAVIOR = CONVERSATION_PRIVATE

But, does not work!