Mysterious 'Entourage' poster haunts an Indian restaurant

Comedy-drama TV series "Entourage", which recently had a movie adaptation, haunts an Indian restaurant with a poster the owner cannot remove.
India Castle, an Indian restaurant in Cambridge, Massachusetts, has a very old "Entourage" poster hanging on its wall, reported Entertainment Weekly.
According to Rabhbir Singh, the owner, when the HBO series had a brief run about five years ago, a local TV representative offered to pay the restaurant owner to have a poster box installed in his restaurant.
Eleven years later, however, the poster still hangs on the wall, as the representative, who said the artwork would change every two weeks, never returned.

Singh does not have the key to the box locks or any other way to break the box.
The TV station, when contacted, said they had no idea where the poster came from or why it is there.