In reply to Helen.

Thanks for the feedback.
Currently, there is no way to suppress the warning. The original intent was to allow users to recognize the scenario and cleanse their data, if need be.
I can see that there are cases where you might know your data contains incompatible characters but you aren't concerned with those particular characters. In those cases, being able to suppress the warning would simplify the log output.
We can certainly look into a future enhancement to add the ability to silence the warning.