PITTSBURGH, Pa. (CBS) — Oops.

NFL Shop sent out “Championship Conference Bound” gear email to Pittsburgh Steelers fans on Monday morning.

But there is one big problem: the Steelers were upset by the Jacksonville Jaguars at home on Sunday.

Some fans who were still trying to get over the loss took their frustration over the email to Twitter.

NFL Shop apologized for the mistake.

“Following the dramatic Divisional Round playoffs, Fanatics experienced an error in our email distribution system which incorrectly triggered NFLShop.com emails to a portion of NFL fans. We take full responsibility for the mistake and have already made sure it won’t happen again,” Fanatics CEO Doug Mack said in a statement.

The Steelers were favored to beat the Jaguars, but lost 45-42.

The Jaguars will face the New England Patriots in the AFC Championship game on Sunday.