Chaos mix item burn on failed attempt

[Namexore]

Hello fellow mu online entrepreneurs, i am making server from a KGemulator season6e3, and i have questions about item mixing, when making the chaos weapon its supposed to not burn on failed attempt, but mine does, is there supposed to be a rule in the mix.bmd for the items not to burn, i cant find any info about this atleast not in english, the only things i have found are the same question as mine but no answers.