We recently performed a data restore from our Octopus Production to Test instance. We then performed an upgrade on our test instance from v2019.3.8 to v2020.4.2.
While mostly a smooth restore and upgrade, we are running into the below error:
"Sequence contains more than one element"
We see this when trying to create a new release in projects (not all, but some). Deleting the release, changing the versioning pattern, changing the package source, changing the Default channel, and removing/re-selecting elements does not work either.
I have seen similar errors in your forum, but I believe it was supposed to be resolved in an earlier release. Is there a fix within Octopus for this? Or does this require the SQL script fix mentioned for similar issues?