Paging Pascale Cosse

For at least the past seven years Pascale Cosse has been named as one of the writers of the film adaptation of The House with a Clock in its Walls, as seen on the Internet Movie Database (imdb.com).

There is no such movie that we can tell and we're not too sure on Cosse's existence either. Lynn Montgomery is also listed as a co-writer on this (thankfully along with Bellairs) and Jean-Claude Schlim's name is listed as "production manager: pre-production." Here is the list of production companies listed as being associated with this but, as with the above names, when or if they ever were involved is unknown.

CineMagic Pictures [de]
Cinevox Filmproduktion GmbH [de]
Iris Productions [lu]
Northwood Productions [ca]

As if all that wasn’t enough, imdb says Luxembourg was one of the filming locations. Our question: why has the entry managed to pollute imdb this long?