According to The Hollywood Reporter, a California judge has agreed, finding that Sabacc was mentioned enough within the Star Wars universe to show that Lucasfilm has a right to it.
This has been part of Star Wars history for years, though the game itself was only mentioned by name in some of the expanded universe material until we actually saw the game in Solo: A Star Wars Story.
Sabacc is the poker game that Han Solo wins against Lando Calrissian that gets him the Millennium Falcon.
The issue at hand was that Lucasfilm never specifically trademarked the name Sabacc, instead relying on the broader Star Wars trademarks to act as an umbrella covering all of the ideas and concepts that are part of the brand.