Create a message correlation with REST: https://docs.camunda.org/manual/7.11/reference/rest/message/post-message/
use processVariablesLocal and make them transient
Expectation: the transient ones do not show up in the database at all.
This is true for the non-local variable, but for the local one, the data shows up in the history and database, which we did not expect.
Please find attached the screenshots.