Yes. It's a common mistake for API specifications and mismatches. Make a v2 correction, deprecate the existing PUT /upload with a Sunset header per RFC 8594

because clients might not want to compute the Sha of very big files. But realistically that's not such a problem for phones, unless we are talking about some embedded systems, like idk a fridge

Computing the hash of a large file is kind of a natural incentive to start chunking... unfortunately I haven't seen a good chunking method yet