this error flooded in my server_log is because of this two functions?

RemovePlayerAttachedObject(playerid, index);

and

SetPlayerAttachedObject(playerid, index, modelid, bone, Float:fOffsetX, Float:fOffsetY, Float:fOffsetZ, Float:fRotX, Float:fRotY, Float:fRotZ, Float:fScaleX, Float:fScaleY, Float:fScaleZ, materialcolor1, materialcolor2);

what it should be instead? could find nothing on docs: https://www.open.mp/docs/scripting/functions/SetPlayerAttachedObject

You talking about two different object attach systems. There are SetPlayerAttachedObject (it's kinda different entity not related to regular server objects) and AttachObjectToPlayer (for already created regular objects). AttachPlayerObjectToPlayer were in fact removed from 0.3 server branch, unfortunately.

but i have no metion of

AttachPlayerObjectToPlayer

in my whole gamemode

Maybe this native is called in some of your filterscripts or plugins

in file a_objects.inc there is a call of this

There are no calls in any of those libs, it is just probably only declared there

yes, there is in line 47 of my a_object have:

native AttachPlayerObjectToPlayer(objectplayer, objectid, attachplayer, Float:OffsetX, Float:OffsetY, Float:OffsetZ, Float:rX, Float:rY, Float:rZ);

and this a object is imported in my a_samp on the line 25

#include <a_objects>

i think my libs are outupdated, right? if it is the case, where to update?

It's not calling, it's declaring

i did ctrl+shift+f in my whole folder o sampserver and that is the only mention of

AttachPlayerObjectToPlayer