How to root Galaxy A8(SM-A800F)

My firmware is android 6.0.1 (XXU1BPH4). I tried to root with CF auto root(for 6.0.1) but it shows "recovery is not seandroid enforcing" error. I tried to flash twrp via odin and it also showed the same error. Pls tell me how to root my phone(with download links). Thanks.

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