Its not often that Sony has to regret making a mistake. But sometimes the very best ends up making one.

Sony admits to using imagery from an “Assassin’s Creed IV: Black Flag” art book in its recently released “Uncharted 4: A Thief’s End” story trailer, as per the Gamespot reports. According to Ubisoft, Assassin’s Creed head of content Azaïzia Aymar points out the use of imagery on Twitter. He jokingly remarks, “I get the ‘thief” title now.”

Even Ubisoft developer, Ubisoft Montreal boss, Alex Hutchinson tweets about the same.

As soon as Naught Dog launched the latest “Uncharted 4: A Thief’s End trailer”, Ubisoft  pointed out the use of the concept art.

Check out the pictures below.

Uncharted 4: A thief's EndNaughty Dog

Uncharted 4: A thief’s End

Assassin's Creed 4: Black FlagUbisoft

Assassin’s Creed 4: Black Flag

Sony soon released an apology related to the matter. “In our eagerness to get the story trailer out we made a regrettable mistake and didn’t thoroughly vet the artwork used for an in game painting,” the Sony representative said. “We’ve already updated the trailer. We hold all artistry in high regard and take full responsibility for having allowed this to happen.

“We want to sincerely apologise to everyone at Ubisoft, the Assassin’s Creed team, the original artist, and our fans.”

Check out the trailers below.

Uncharted 4: A Thief’s End is an upcoming action-adventure third-person shooter platform video game developed by Naughty Dog and published by Sony Computer Entertainment for the PlayStation 4 video game console.

Assassin’s Creed IV: Black Flag was a 2013 action-adventure video game developed by Ubisoft Montreal and published by Ubisoft. It was the sixth major instalment in the Assassin’s Creed series.

Kotaku says, “Maybe it’s an homage. Maybe it’s a mistake. Maybe Nathan Drake bought the Assassin’s Creed IV: Black Flag art book and liked it so much, he decided to frame one of the paintings. Either way, it’s undeniable that AC artwork appears in Naughty Dog’s latest.”

Sony has already taken down the trailer and posted an edited version of it.