The consistency level cannot be set. Thus queries are executed with default consistency ONE. This will be incorrect in some various cases.
The execution profiles allows to set of shared options, including the consistency level:
https://docs.datastax.com/en/developer/nodejs-driver/4.1/features/execution-profiles/
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I'll close this one, as you can set the consistency level using the execution profiles.
thanks for creating the ticket, let me know if you have any doubt.