A Starbucks location in downtown Buffalo—one of the first locations to join a nationwide labor organizing effort—has voted to dissolve its union after submitting a decertification petition to the National Labor Relations Board (NLRB) last week, according to Bloomberg.

The decision by employees comes two years after the location voted 18-1 in favor of union representation. It was the sixth Starbucks in Buffalo to officially form a union.

The news comes about a month after former CEO Howard Schultz’s testified at the Senate labor committee, where he repeated the coffee chain’s union-busting talking points during an often contentious hearing.

It was not immediately clear why the store had petitioned to decertify its union, as it is not necessary to provide a reason to the NLRB.