UNITED NEWS INTERNATIONAL (UNI) — The Pentagon has stopped accepting F-35s from Lockheed Martin because of a dispute over who should pay to fix the jets after a production issue was found last year.

Lockheed confirmed on April 11 that the Pentagon had stopped accepting deliveries of the jet over a contractual issue, but did not provide further details.

However, Reuters reported that officials discovered an issue last year that was causing some of the aircraft’s panels to corrode.

More than 200 jets were affected.

The Pentagon initially halted deliveries of F-35s for 30 days after the problem was discovered, but resumed after a fix was devised.

However, the Pentagon has stopped deliveries again over a disagreement as to who will pay to fix the affected aircraft, which are currently stationed around the world.

It’s the latest setback for the F-35 program, which has faced billions of dollars in cost overruns and significant schedule delays.