The graffiti artwork on display in South Korea was damaged by a couple who thought the brushes and paints placed in front of the work were for the visitor’s use.
“They made a mistake because they thought they were allowed to do it as participatory art,” the director of the exhibition in Seoul told Reuters.
After staff found a fresh brushstroke, CCTV footage identified accidental vandalism of men and women in their twenties.
Untitled works are estimated to be worth about $ 500,000 (£ 360,000).
It was painted by American graffiti artist JonOne in front of an audience in Seoul in 2016.
Since then, it has been exhibited at various venues, along with the paints and brushes used in live performances, which are considered an integral part of the artwork.
“We are currently discussing with the artist whether to restore it,” Kang-wook, who is responsible for the exhibition at Lotte World Mall in Seoul, told Reuters.
Police found the couple in the gallery and cross-examined them. The organizer decided not to sue and the pair was released.
Due to the incident, the gallery installed a small fence in front of the graffiti and added an additional sign, “Don’t touch.”