Hi! The golang-github-valyala-fasthttp package used to have date-based release numbers (current Debian version 20160617-2). Upstream has since switched to semver (latest upstream version 1.31.0).
So the version scheme has been reset, and unfortunately given that no prefix was used when initially packaging this, an epoch seems to be in order now. I'm planning on updating in the coming days to the latest upstream release and bump the version using an epoch. Thanks, Guillem