It appears that those behind the scenes at Sunderland AFC might have been a little too confident about securing promotion to the Championship.
Ahead of the play-off final against Charlton on Sunday afternoon, big screens in the North East highlighted that there would live music and entertainment at The Stadium Of Light between 4pm and 8pm.
It would have been free entry to the stadium, with the full squad and manager attending the Bank Holiday Monday event.
But of course, Sunderland conceded a last minute goal to lose the final after Charlton's Patrick Bauer knocked in from close range and the 'promotion party' was officially cancelled.
According to Chronicle Live, the advert was briefly screened in error, with the club making plans in the event of a positive scoreline.
It was a day of 'what could have been' moments for Sunderland after an incredible lucky start to proceedings.
Charlton pair Dillon Phillips and Naby Sarr were involved in a farcical own goal as they handed their opponents an early lead.
Sarr attempted a pass back to keeper Dillon Phillips after just four minutes, but the goalie completely missed it and the ball rolled into the net to hand Sunderland the lead:
But goals from Ben Purrington and Patrick Bauer sealed a historic win for the Addicks.
After the full-time whistle, Sunderland manager Jack Ross backed his players to bounce back from the adversity of defeat:
"We have fallen short - not by very much but we have done," he said after his side's 2-1 defeat.
"You have to deal with the adversity and the knocks and move forward from them. You can't just enjoy things when they are going well and not be able to deal with it when it goes against you.
"I believe in my own abilities but you have to have a group of players who will continue to do that as well."
Can Sunderland secure promotion next season?
Let us know in the comments below.