No, this is rather a sign that is was accepted (although not necessarily, this depends on the journal). For more about preprints, see:

https://help.researchgate.net/hc/en-us/articles/14293104044177-Preprints

See also these discussions:

https://www.researchgate.net/post/What_is_your_understanding_of_the_term_preprint/1

https://www.researchgate.net/post/How-preprints-are-different-from-other-publications/1

https://www.researchgate.net/post/Preprint_for_publication/1

https://www.researchgate.net/post/What_is_a_Preprint/1