According to Repology, the current upstream release is 1.0.3a. Please bump.
There is no new release for slrn : http://jedsoft.org/releases/slrn/ There is a confusion around the 'a' present in the filename, but not in the contained directory. And there is no precedent for such numeration. According to Repology, there is no consensus: Debian and openSuse use also 1.0.3, Fedora and FreeBSD append the 'a'.
Thanks for the explanation. I've reported it to Repology, and let's see if they can figure out a way to make both versions equivalent.