The original park project cost 420 million Francs. On 1/31/1988 the park filed for bankruptcy. It was later bought by Belise Loisirs for 53 million Francs.
Perhaps it was unrelated to the bankruptcy process or this process in France takes some time as the park operated for the 1988 and 1989 seasons and wasn't closed until the 1990 season. The park reopened for the 1991 season, which turned out to be its last.