The Zutons were named as a headline act for the festival
A music festival for 10,000 students is being moved out of Cornwall after objections from local people.
Organisers of Beach Break Live are taking the festival to Port Lympne in Kent.
The festival, with headliners Dizzee Rascal and The Zutons, was due to take place at St Agnes, from 16 to 19 June.
But Cornwall Council threatened it with an injunction after objections about safety and traffic. Police say ticket-holders should not travel to Cornwall.
The festival had been planned for Agnes Beacon, where parties and events like the Surfers Against Sewage Ball have been held many times before.
Key authorities, including the police, had no objection and a licence was granted.
But on 27 May plans were rejected by Cornwall councillors, who heard concerns from local people about the dangers of so many teenagers partying close to the cliffs, traffic and noise.
Gareth Cooper from Outgoing Travel, one of the festival's investors, told BBC News that it was an "unusual state of affairs".
He said negotiations for another site "on the south coast" were still taking place and an announcement would be made soon.
The move leaves thousands of festival-goers having to change plans with just over a week before the festival.
He said: "I think Cornwall is going to have problems getting trust from any event promoter in the future. It does not look good.
"Cornwall needs this business in the recession and a few individuals that have upset it have let down many people."
One ticket holder, 20-year-old Rozita Rahman from Plymouth, said: "I'm definitely worried about the situation.
"I have no idea what's going to happen.
"But if it's going to be on a different site that's not near Cornwall I would definitely expect a refund because it would be very difficult for me to get to."
Cornwall Council said in a statement that alternative sites within the county had been explored over the last two weeks, but "no feasible alternative" had been found.
It said: "The council is supportive of well-organised large music events within the county which meet the relevant planning and licensing criteria and there has been a history of a number of such events which have been successful.
"The council, its officers and members are keen to be involved in early pro-active discussion with event organisers on all future occasions."
Police in Cornwall have reminded ticket-holders not to travel to St Agnes.
Mid Cornwall Commander Supt Julie Whitmarsh said: "While it is extremely unfortunate for those who have purchased tickets, we now know this event will not go ahead.
"We are working with Cornwall Council and other partners to ensure visitors do not congregate on the site and that no unauthorised events take place in the area."