On Friday, litigants announced a settlement to end a contentious copyright lawsuit over a short film and a proposed feature-length film based in the Star Trek universe. The lawsuit was filed last year and involves Star Trek fan-fiction producer Axanar Productions, Paramount Studios, and CBS.

The parties did not disclose all the details of the settlement, which is sealed from the public record. But a joint statement from Axanar and the plaintiffs noted that the defendants “acknowledge that both films were not approved by Paramount or CBS and that both works crossed boundaries acceptable to CBS and Paramount relating to copyright law.” A spokesperson from Axanar told Ars Technica in an e-mail “we’re not paying anything,” with respect to the settlement.

The settlement will also require the fanfic producer to “make substantial changes to Axanar to resolve this litigation.” According to a statement from Axanar, this includes changing the proposed feature-length film into two 15-minute short film episodes, which will be posted on YouTube without advertising from which Axanar could earn revenue. The 20-minute Prelude to Axanar will be allowed to stay on YouTube.

Axanar Productions was founded after some Star Trek enthusiasts raised more than $1.1 million on Kickstarter to create a high-quality, feature-length Star Trek movie based on the story of Captain Kirk’s hero, Garth of Izar. Axanar Productions, under the leadership of Alec Peters, created Prelude to Axanar in 2014. The company was hoping to release the full-length movie in 2016—until Paramount Pictures and CBS sued for copyright infringement.

Axanar claimed the lawsuit was unexpected because CBS had a long history of turning a blind eye to fan fiction using Star Trek characters and names, especially since the project was supposed to be non-commercial, meaning that the production company wouldn’t try to make a profit selling tickets or DVDs or T-shirts.

Paramount and CBS argued that Axanar was trying to make professional-quality work and objected “to professional commercial ventures trading off our property rights.”

A civil trial had been scheduled for January 31, 2017 after a judge ruled in early January that Prelude to Axanar and its planned feature-length movie could not avoid an infringement trial on the basis of a fair-use exception.

Last June, Paramount and CBS issued a list of 10 rules for Star Trek fan fiction creators . The list includes dictates that films can’t be longer that 15 minutes and stories can’t exceed 30 minutes; uniforms and props must be “official merchandise;” and all films must be family-friendly, without any profanity, nudity, drugs, or alcohol.

As part of the settlement, Axanar agreed to assure Paramount and CBS that “any future Star Trek fan films produced by Axanar or Mr. Peters will be in accordance with the ‘Guidelines for Fan Films’ distributed by CBS and Paramount in June 2016.”

Paramount and CBS issued a statement saying that they “continue to be big believers in fan fiction and fan creativity” and will “not object to, or take legal action against, Star Trek fan productions that are non-professional, amateur, and otherwise meet the Guidelines.”

In a statement from Axanar, the company said, “Since the beginning of the lawsuit, over a year ago, we have expressed our desire to address the concerns of the studios and our willingness to make necessary changes, as long as we could reasonably meet our commitments to Axanar’s over 14,000 donors, fans, and supporters. We are now able to do exactly that.”

The statement continued: “Axanar Productions was created by lifelong Star Trek fans to celebrate their love for Star Trek. Alec Peters and the Axanar team look forward to continuing to share the Axanar story and are happy to work within the Guidelines for Fan Films for future projects. Throughout this process, we will continue communicating with our fans and backers to ensure they are informed and involved until we reach completion of the production.”