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Suggestions
Delete, updeploy and update could be considerate idempotent actions (It depend from the context). As example in a deleting or updating query (if they doesn't contain non-deterministic functional call) are idempotents.
In a scenario of an instance with more than one elements, and there is a failed undeployment, the user can try again, and the ACM-participant will try to undeploy all elements.
The table show the the allowed values using the "updateCompositionState" method.
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