Because a screenplay is a reinterpretation of the original for another medium.
From the metro.co.uk
And what passed for innovation was more often a reinterpretation of greatest hits.
From the nytimes.com
The study calls for a reinterpretation of modern human evolutionary scenarios.
From the sciencedaily.com
Leonardo DiCaprio and Claire Danes starred in that audacious 1996 reinterpretation.
From the post-gazette.com
Reinterpretation of histology of proximal colon polyps called hyperplastic in 2001.
From the sciencedaily.com
Alternately tallies may change because of a reinterpretation of voter intent.
From the en.wikipedia.org
In contrast, the only way religion can modify its ideas is through reinterpretation.
From the guardian.co.uk
The term feminism itself has been turned on its head and is up for reinterpretation.
From the washingtontimes.com
Together, these works amount to an important reinterpretation of French romanticism.
From the en.wikipedia.org
More examples
A new or different meaning
In the analysis of 18th- and 19th-century Western music, an elision, overlap, or rather reinterpretation (Umdeutung), is the perception, after the fact, of a (metrically weak) cadential chord at the end of one phrase as the (metrically strong) initial chord of the next phrase. ...
An unexpected meaning or function of the connector that shatters the target assumption.