Thumbs up [Q] Set Individual Ringtones to Contacts - WhatsApp issue

After I assign a custom or different stock ringtone to Contact A, the ringtone also gets played when a WhatsApp message is received from that contact. How can I stop this from occurring? Please guide.

Found the answer:
EDIT: go to whatsapp setting -> notifications -> uncheck contact ringtone (use contact's ringtone as notification ringtone)
【▀▄】 Phone ► Sony Xperia Z1
【▀▄】 ROM ► RomAur v9.1 [ LB-UB ]
【▀▄】 Recovery ► Z1_DooMLoRD_AdvStkKernel_FW-108_v05
【▀▄】 Root ► EasyRoot v11
【▀▄】 Kernel ► Stock
【▀▄】 Bootloader ► Unlocked
【▀▄】 THEME ► Clean Foggy