How to prove that the Fibonacci sequence $7\mid U_m\Longrightarrow 8\mid m$ and $4\mid U_m\Longrightarrow 6\mid m$

How to prove that the Fibonacci sequence $7\mid U_m\Longrightarrow 8\mid
m$ and $4\mid U_m\Longrightarrow 6\mid m$

How to prove that the Fibonacci sequence $$7\mid U_m\Longrightarrow 8\mid
m$$ and $$4\mid U_m\Longrightarrow 6\mid m$$I was confused because there
$\{ 4,7 \}$ in Fibonacci sequece