Setting server.rewriteBasePath to false doesn't get rid of kibana asstistant upgrade warning

Hello,

I am trying to resolve all warnings from elastic upgrade assistant for going from version 7.17.8 to 8.5.3.

For the following error

I tried set server.rewriteBasePath to false in kibana.yml and despite applying the new configuration to kibana, the warning still shows. Is it normal?

I am using elastic/helm_charts to deploy it on kubernetes. I was wondering if the value for server.rewriteBasePath was already set to true in those charts or somewhere else.

Thanks for any help