A federal judge in Washington, D.C., has issued a preliminary injunction ordering top national security officials who discussed military operations on the encrypted messaging service Signal to notify the acting archivist of the United States of any messages they have that may be at risk of being deleted. But in calling for those records to be preserved, the ruling stopped short of ordering the government to recover past messages that may already have been lost.

American Oversight, a nonprofit government watchdog, brought the lawsuit after the journalist Jeffrey Goldberg was mistakenly added to a group chat on Signal in which Trump administration officials discussed a planned U.S. military attack against Houthi rebels in Yemen. American Oversight says the officials violated federal records law with their use of Signal, a commercial messaging app that allows messages to be automatically deleted.

In his ruling Friday, U.S. judge James Boasberg said American Oversight had failed to show that the recordkeeping programs of the agencies involved in the case are “inadequate,” or that “this court can provide redress for already-deleted messages,” as the group had requested.