heat/releasenotes/notes/manual-rollback-failed-repl...

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---
fixes:
- |
Heat can now perform a stack update to roll back to a previous version of a
resource after a previous attempt to create a replacement for it failed
(provided that convergence is enabled). This allows the user to recover a
stack where a resource has been inadvertantly replaced with a definition
than can never succeed because it conflicts with the original. Previously
this required automatic rollback to be enabled, or the user had to update
the stack with a non-conflicting definition before rolling back to the
original.