The Valencia street circuit is planning to reduce its seat capacity for this year's European Grand Prix.
Last year's event, the first in the Spanish city, had a seat capacity of 112,000, but organizers said on Thursday that there will be reduction of around 35,000 seats, bringing the capacity down to 75,000.
Jorge Martinez Aspar, vice-president of the race's promoters Valmor Sport, said tickets sales had been slower than last year. He said the dispute between the FIA and the Formula One Teams' Association was partly to blame for the slow ticket sales.
"It has slowed things down a lot," Aspar told the EFE news agency. "The only thing I'm hoping for is that the last few months are erased, because there has been people who have talked too much."