The piece of art, titled “When It Starts Dripping From The Ceilings,” features a series of wooden planks and a (formerly) discolored plastic bowl. The artist, the late Martin Kippenberger, intended for viewers to understand that the bowl had been discolored by water running over the pieces of wood.

Unfortunately, the bowl isn’t so discolored anymore. A spokesperson from the art museum in Dortmund, Germany, remarked that “it is now impossible to return it to its original state.” The cleaner was apparently unaware that she was supposed to stay at least 20 centimeters away from the works of art.