We have still problems here with remove traps npc trainer. I relation to this behavior, perhaps bug depends on a indirect trap disarm skill? I have same bug behavior on my local server weapon trainers, when i use unpatched lua function SetSkill() for the lua logic?

If the bug is not in your script, i would say, you have changed the trapdisarm skill to an indirect skill somehow on season server?

So fix could be to change it back to direct skill or remove the indirect skill level block logic in SetSkill().

https://www.daimonin.org/12206/lua-function-setskill/msg109522/topicseen/#msg109522

I personally don't understand the logic behind this block. Full function is limited to level up only 1 level and function can only be started by lua scripts, dev team decides where these scripts are. I would remove this block. Also helps future scripters not to waste time, when they ask themself, "Why is this function not working on my skill?" 

Edit: I have seen you have changed SetSkill function, looks like this function currently don't work. Also Frakah don't work on public.

This was a pain. Yes really. Such a mess. Public trunk give me a totally broken lua SetSkill function.
I spend several hours trying to understand functional and non functional code in relation to this. I know it's always time, but when muliply coders have not the time to read in, what other coders have done there, then we end in chaos with logics from multiply asyncron minds. Each one is doing things, without the understanding, what the other has done. This is how it looked there.

Also the idea of building a function to set a skill and then targeting a exp_adjust is not the best. We need always to calculate exp for this levels from outside first. This leads to more mess, like we calculate the excact exp outside, calling exp_adjust and this functions grants bonus exp. Next is this mess of direct and indirect skill. We adjust both skills with exp_adjust and this function works with exp, so we need not differenciate this in exp_adjust. Also this cap in lua setskill, when someone has 1 exp in an indirect skill, setskill lua refuse to give next level? Why? That's so much useless restrictions only blowing code up, make it more and more not understandable.

So i defined a new flag EXP_FLAG_NO_BONUS. This means admin commands can target exp_adjust without the bonus calculation to get excactly the exp or the level they want using commands /setskill /addexp

I reworked exp_adjust, there was also some broken logic in. I didn't differenciate anymore between DIRECT and INDIRECT level. The working logic for indirect level has replaced the broken logic for direct level. I also updated exp.h and c_wiz.c to to use the new flag.

I tested this so far.
command /setskill name skillnr skilllevel works fine in both directions for direct and indirect level
command /addexp name skillnr exp works fine in both directions for indirect level
from luascript size i only tested so far level up 1 indirect level, this uses also the EXP_FLAG_NO_BONUS, so it gives perfect the exp to reach next level.

So at least the level/exp adjustments working fine. Next is exp_adjust also adjusting mana and grace. This is really a bad place to put this in here, adjusting mana and grace, but ingnoring hp? This hp, mana, grace adjustment should be done in one function and outside exp_adjust, where exp_adjust can call this. But currently i don't go there. I still focus on exp logics first.

https://github.com/Kamor/Dolfo/blob/main/server/src/include/exp.h
https://github.com/Kamor/Dolfo/blob/main/code/AddExp
https://github.com/Kamor/Dolfo/blob/main/bugfix/GameObject_SetSkill
https://github.com/Kamor/Dolfo/blob/main/bugfix/exp_adjust