title: solr 8 "msg":"ERROR: unknown field 'language'"
body: <p>While updating solr 4 to solr 8, I am facing the error bellow when I am running the indexation to index my solr 8 cloud.</p>
  
  <pre><code>    {
        "responseHeader":{
         "rf":1,
          "status":400,
         "QTime":118},
         "error":{
         "metadata":[
            "error-class","org.apache.solr.common.SolrException",
            "root-error-class","org.apache.solr.common.SolrException"],
            "msg":"ERROR: [doc=16919!1379235912] unknown field     'language'",
  "code":400}}
  </code></pre>
  
  <p>I run thie url</p>
  
  <pre><code>    curl -s 'http://localhost:8983/solr/currnet1/update/csv?commit=true&amp;separator=%09&amp;escape=%5c&amp;header=false&amp;+fieldnames=id,doc_id' -H  'Content-type:text/plain; charset=utf-8' --data-binary @/Users/smukena/Projet/servers/solr-8.1.1/tsv/sampleFile.tsv
  </code></pre>
  
  <p>and my sampleFile.tsv has only one line with two column</p>
  
  <p>There is no the field language in my schema.xml and in solrconfig.xml neiether.</p>
  
  <p>What am I doing wrong</p>