Multiple entries with same key

I’m getting this error when trying to query an elasticsearch database. I have no control over the db and have been told it can not be “fixed”.

The full error is “Multiple entries with same key: src_country_code=SRC_country_code: Utf8 and src_country_code=src_country_code: Utf8”.

Obviously, the there are two fields called src_country_code with different cases. I would be ok with either treating them as different or combining them. However treating it as an error makes dremio unusable for me.

Is there a setting that can change this behavior?