Samsung Galaxy J5(SM-J500F) ROOTING PROBLEM

I am using galaxy j5(sm-j500f).. I root this device using CF-AUTO ROOT... Root access is successful. After this i signing in my acc.(google,whtsap etc). But when i restart it... it stucks on CUSTOM BINARY BLOCKED BY FRP. After that i use stock rom through ODIN.
One thing i want know why it stucks and then how did i root ?????

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