@julian_knight - I noted the bug you raised here: InvalidStreamSortException when replication key is not unique (#120) · Issues · meltano / Singer SDK · GitLab I plan to release shortly as a standalone patch, as

v0.1.5

. I won’t do a full blog post today but I will call it out when we get to next week’s release. Thanks for raising!

Thanks @aaronsteers! and no hurry, your workaround worked just fine