Two companies have filed lawsuits with the U.S. Court of Federal Claims over the award of the General Service Administration’s Alliant 2 contract, hitting the breaks on the second version of GSA’s best-in-class Alliant vehicle.

OBXTek, based in Tysons Corner, Virginia, filed the first lawsuit on Nov. 29, 2017, and Centech, based nearby in Falls Church, filed its lawsuit Dec. 26, 2017, as originally reported by Washington Technology.

GSA announced that they had awarded the $50 billion Alliant 2 contract to 61 companies in mid-November 2017.

Centech is currently a holder of the original Alliant contract, according to the company’s website. ObxTek is currently on the Alliant Small Business contract, which is exclusive to companies under a certain size, according to the company’s website.

Capgemini Government Solutions of McClean, Virginia; Harris IT Services Corporation of Herndon, Virginia; Kratos Technology and Training Solutions of San Diego, California; and Centech all filed protests with the Government Accountability Office after the Alliant 2 awards were announced. All four were dismissed on Dec. 20, 2017.

A GSA spokesperson told Federal Times that the agency does not comment on pending litigation.