[Malte Müller]

As we all know Wikipedia is not always a reliable source. Wikipedia also has a lengthly entry about that tone poem and it does not mention the movie:

October, Op. 131, is a symphonic poem composed by Dmitri Shostakovich to commemorate the fiftieth anniversary of the October Revolution in 1967. He was spurred to compose the work after reencountering his score for the Vasilyev brothers’ 1937 film Volochayev Days [ru], reusing its “Partisan Song” in October. Although Shostakovich completed the work quickly, the process of writing it fatigued him physically because of his deteriorating motor functions.

https://en.wikipedia.org/wiki/October_(Shostakovich)

Same text here https://www.boosey.com/cr/music/Dmitri-Shostakovich-October/3162?langid=1&sl-id=2

I think we have a confusion with the movie due to the same name generally. Fact is for sure though that Schostakovic music was tracked to the movie.