Apparently, Tyga arrived late and performed for only 10 minutes instead of 1hr. Hence, breach of contract led to the brawl.
According to reports the 'Fan of Fan' rapper breached his contract by coming super late at the club he was to perform for an hour. He got the Swizz club owner really angry which led to the fight.
A source tells the site that Tyga was scheduled to play a show at Envogue Genève, a club in Geneva, Switzerland for an hour but he showed up super late and only performed for about 10 minutes.
Tyga then left the club around 4 AM and got in his car with Kylie. The enraged owner ran after the rapper yelling for Tyga.
Tyga, who had gotten into his car then got out of the car to join in the fracas, but an eyewitness says someone in the owner's posse flashed a gun. That was apparently enough for Tyga to make a hasty retreat, leaving his bodyguards behind.
Watch what happened below: