Spells Cast Time

How to change Spells Cast Time to custom ??? where i can change this ??

SpellCastTimes.db2 contains CastTimeEntry id’s and their respective cast times.

You can change a spells cast time to use of these entries instead by adding a spell fix in LoadSpellInfoCorrections in SpellMgr

ApplySpellFix({ SPELL_ID }, [](SpellInfo* spellInfo)
spellInfo->CastTimeEntry = sSpellCastTimesStore.LookupEntry(ID_FROM_DB2_FILE);