Removing message_raw_header prefix from field names

[Zheng Lin Edwin Yeo]

Hi,

When I index EML files to Solr, I realised that there are certain fields
which are prefix with message_raw_header (Eg:
message_raw_header_x_receiver). There is no message_raw_header prefix in
the EML files.

Is there any way that we can remove the message_raw_header for all the
fields directly in Solr?

I am using Solr 7.7.1, which comes with Tika 1.19.1

Regards,
Edwin