Mr Wylie agreed the event at Black Barn was "a classic example" of a wider issue of pre-loading and intoxication among a younger demographic at events.
He said police generally found those who arrived to such events early were the responsible ones, for whom drinking was second to the music.
"The next wave of people to arrive are those who have had a pre-event gathering with friends who focus more on drinking and the music is ancillary to that," he said.
"The obvious reasons for pre-loading is to save money. A lot of people who preload overdo it, thinking if they drink heavy early the effects will see them through the entire night. Often the case however is they simply get heavily intoxicated early in the night and find themselves in trouble."
It has been reported the Alcohol Regulatory and Licensing Authority, in suspending de Jager's manager's certificate, said he allowed people to become intoxicated, and allowed intoxication and disorderly behaviour on a licensed premises. He did not dispute the grounds for the application and agreed to the suspension of his certificate for 28 days from April 11.
But Mr de Jager said: "In no way did the bands themselves encourage negative behaviour and we shut down bars earlier than usual to try and help control the situation.
"Sadly, an outcome going forward is that we will need to look at our concert mix for the coming seasons and make selections based not only on talent of the bands but also on the audience they are likely to attract."
The venue wanted to continue to do everything they could "to ensure we have a happy crowd, behaving responsibly, enjoying great music at a venue that has become renowned for a great night out", Mr de Jager said.