We are not convinced that we get any value from our preview releases. We have agreed that these should be dropped as the increased effort of testing and supporting update paths is not worth the unforeseeable benefit.

In addition, this change aligns us with the versioning policy of other components in Camunda (C7 and C8).

Tasks:

• Update the version policy in our documentation: https://github.com/camunda/camunda-platform-docs/pull/1544
• (Optional) remove the previous preview versions from our download page: https://github.com/camunda/camunda-docs-static/pull/318
• Update our Confluence release process to remove references to preview releases - DONE
• Update our CI/release job if it refers to preview specific changes: N/A
• Update our C8 release process to no longer consider preview releases - https://modeler.cloud.camunda.io/projects/85c5a511-69a2-4cd2-8656-55ca8612b8f8--optimize-release-process
• Remove preview release upgrade support from our codebase/tests: https://github.com/camunda/camunda-optimize/pull/5551