Prediction market Polymarket has had a rare conflict with its oracle service, UMA, over whether Barron Trump is involved in the DJT token. Although the UMA has repeatedly ruled that the answer is "no", Polymarket says UMA made a mistake and plans to correct it. The dispute has attracted widespread attention, with bets exceeding $1 million. Polymarket CEO Shayne Coplan did not comment on specific solutions or timelines.