Zero divisors in annihilator of modules

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I faced a theorem

Let $R$ be a noetherian local ring, $M$ a finitely generated module of finite projective dimension. Then if the annihilator of $M$ is not trivial, then it contains a nonzero zero divisor in $R$.

Or more precisely, in this form.

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This is a part of Vasconcelos' paper Ideals Generated by R-Sequences, he referred paper of Auslander and Buchsbaum Homological dimension in local ring. But there is no Proporsition 6.2 in the paper referred.

My question is, how to prove this proposition?