When a project has multiple unreleased versions, it's not possible to link the last one to an issue in an automation rule. It's only possible to link the "Next unreleased version" which is actually the oldest unreleased version.

Specifically when using the automation trigger "Version created" and then using this trigger to create an issue which must be linked to this newly created version.

This can be used for following the progression of:

• Builds
• Version documentation
• Integration tests

Especcially when a project does not have this automated