Wachtell, Lipton, Rosen & Katz successfully forced X Corp.’s lawsuit against the firm into arbitration, a San Francisco County Superior Court judge ordered on Monday.

X Corp. sued Wachtell in July over a $70 million success fee the firm obtained from the company’s former board of directors on the eve of Twitter’s purchase by Elon Musk. The billionaire had attempted to back out of the deal, prompting Twitter’s retention of Wachtell.