Running ES 6.7 viewing the kibana upgrade assistant has warnings

Want to upgrade to v7x
In the kibana upgrade assistant i have warnings.

Fields in index template exceed automatic field expansion limit
I've tried to research and resolve this warning but not sure where to begin. Any help much appreciated.

I was able to resolve my issues. I had a problem with curl command.

Hi! Reedler
Can I ask you how yo get rid of that warning? cause I tried to put indices.query.bool.max_clause_count: 2000 in the elasticsearch.yml, but still warning me about that, any Idea?

Thanks in advance

Regards

Rod