The Trump administration is taking steps to reinstate thousands of probationary federal workers who were fired in an effort to downsize the government, according to court filings in one of two cases where judges deemed the terminations unlawful.

U.S. District Judge James Bredar, an Obama appointee, ordered the mass reinstatement of employees at 18 federal agencies last week, determining that the administration’s justification for the firings—poor performance—was not supported by evidence. The ruling follows another decision by a federal judge in San Francisco, who also found terminations at six agencies to be illegal.

According to more than a dozen declarations filed by the government Monday night, the administration has moved to reinstate roughly 24,000 probationary workers.

According to the Monday night filings, many of the reinstated employees have been placed on paid administrative leave, while others have returned to full employment. However, officials warn that the reinstatement process could create confusion and operational challenges, particularly for employees who are reinstated only to potentially face termination again if an appellate court overturns the ruling.

Reesha Trznadel, the acting chief human capital officer at the Department of Energy, cautioned in a declaration that reinstating employees “could impose burdens on DOE and cause significant confusion and turmoil for the terminated employees.”

Since taking office, the Trump administration has taken aggressive steps to reshape the federal bureaucracy, including dismissing employees during their probationary periods. The recent ruling represents a legal setback for these efforts, reinforcing protections for federal workers and challenging the administration’s justification for its sweeping dismissals.

The legal battle is expected to continue, with the possibility that an appellate ruling could overturn Bredar’s decision. Until then, agencies must navigate the complexities of onboarding and retraining employees who may face further job uncertainty in the months ahead.