Create release can fail with a "Sequence contains more than one matching element exception"

[slewis74]

In at least the scenario where a script step has selected to run a script from a package and also has an additional package specified, the exception mentioned in the title can occur when calling create-release.

Step config for the above was

and executed

octo create-release --server=MY_SERVER--apiKey=API-???? --project="Test project"

Impacted Versions:
Reproduced in as early as 7.4.x, code suggested may have existed since 6.6.0.

[octoreleasebot]

Release Note: Fixed an issue where release creation could fail with a "Sequence contains more than one matching element" exception