A federal judge in Texas ruled Wednesday that a regulation intended to preserve the Obama-era Deferred Action for Childhood Arrivals program is unlawful, delivering a major blow to the Biden administration.

Last year, the administration moved to preserve the program – which protects undocumented immigrants who were brought to the US as children – and released a rule to codify the policy into a federal regulation.

But in a Wednesday filing, Judge Andrew Hanen, of the Southern District of Texas, maintained that DACA is unlawful and argued the rule violated the Administrative Procedure Act, a law that governs how agencies make regulations. The order doesn’t impact current beneficiaries of the program.