Phrase search not working

"msg": "field \"_text_\" was indexed without position data; cannot run PhraseQuery (phrase=_text_:\"dan pilone\")",
"trace": "java.lang.IllegalStateException: field \"_text_\" was indexed without position data; cannot run PhraseQuery (phrase=_text_:\"dan pilone\")\n\tat org.apache.lucene.search.PhraseQuery$1.getPhraseMatcher(PhraseQuery.java:434)\n\tat org.apache.lucene.search.PhraseWeight.scorer(PhraseWeight.java:46)\n\tat org.apache.lucene.search.Weight.bulkScorer(Weight.java:177)\n\tat org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:659)\n\tat org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:463)\n\tat org.apache.solr.search.SolrIndexSearcher.buildAndRunCollectorChain(SolrIndexSearcher.java:217)\n\tat org.apache.solr.search.SolrIndexSearcher.getDocListAndSetNC(SolrIndexSearcher.java:1718)\n\tat org.apache.solr.search.SolrIndexSearcher.getDocListC(SolrIndexSearcher.java:1435)\n\tat org.apache.solr.search.SolrIndexSearcher.search(SolrIndexSearcher.java:586)\n\tat org.apache.solr.handler.component.QueryComponent.doProcessUngroupedSearch(QueryComponent.java:1435)\n\tat org.apache.solr.handler.component.QueryComponent.process(QueryComponent.java:375)\n\tat org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:298)\n\tat org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:199)\n\tat org.apache.solr.core.SolrCore.execute(SolrCore.java:2539)\n\tat org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:709)\n\tat org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:515)\n\tat org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:377)\n\tat org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:323)\n\tat org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1634)\n\tat org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:533)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)\n\tat org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)\n\tat org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)\n\tat org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)\n\tat org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)\n\tat org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)\n\tat org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)\n\tat org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:219)\n\tat org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)\n\tat org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)\n\tat org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)\n\tat org.eclipse.jetty.server.Server.handle(Server.java:531)\n\tat org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:352)\n\tat org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)\n\tat org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:281)\n\tat org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)\n\tat org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)\n\tat org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)\n\tat org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:760)\n\tat org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:678)\n\tat java.lang.Thread.run(Thread.java:748)\n",
"code": 500