Apache Solrを使ったMoodleグローバル検索でエラー

CentOS7にApache Solr 8.0.0をインストールし、Moodle3.6.3で連携してグローバル検索しようとしたところ、
以下のようなエラーがApache Solr側で表示され、検索できませんでした。
Moodle側でのインデックス化は問題なくできています。
titleというfield nameが有効でないということだと思うのですが、
どのような解決策が考えられますでしょうか。

org.apache.solr.common.SolrException: org.apache.solr.search.SyntaxError: Query Field 'title' is not a valid field name
	at org.apache.solr.handler.component.QueryComponent.prepare(QueryComponent.java:216)
	at org.apache.solr.handler.component.SearchHandler.handleRequestBody(SearchHandler.java:272)
	at org.apache.solr.handler.RequestHandlerBase.handleRequest(RequestHandlerBase.java:199)
	at org.apache.solr.core.SolrCore.execute(SolrCore.java:2559)
	at org.apache.solr.servlet.HttpSolrCall.execute(HttpSolrCall.java:711)
	at org.apache.solr.servlet.HttpSolrCall.call(HttpSolrCall.java:516)
	at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:394)
	at org.apache.solr.servlet.SolrDispatchFilter.doFilter(SolrDispatchFilter.java:340)
	at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1602)
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:540)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146)
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257)
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1588)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1345)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:480)
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1557)
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1247)
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
	at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:220)
	at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.java:126)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.rewrite.handler.RewriteHandler.handle(RewriteHandler.java:335)
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
	at org.eclipse.jetty.server.Server.handle(Server.java:502)
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:364)
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:305)
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:103)
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168)
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126)
	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:765)
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:683)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.solr.search.SyntaxError: Query Field 'title' is not a valid field name
	at org.apache.solr.search.ExtendedDismaxQParser.checkFieldInSchema(ExtendedDismaxQParser.java:275)
	at org.apache.solr.search.ExtendedDismaxQParser.checkFieldsInSchema(ExtendedDismaxQParser.java:287)
	at org.apache.solr.search.ExtendedDismaxQParser.validateQueryFields(ExtendedDismaxQParser.java:226)
	at org.apache.solr.search.ExtendedDismaxQParser.parse(ExtendedDismaxQParser.java:151)
	at org.apache.solr.search.QParser.getQuery(QParser.java:173)
	at org.apache.solr.handler.component.QueryComponent.prepare(QueryComponent.java:158)
	... 41 more
Caused by: org.apache.solr.common.SolrException: undefined field: "title"
	at org.apache.solr.schema.IndexSchema.getField(IndexSchema.java:1234)
	at org.apache.solr.search.ExtendedDismaxQParser.checkFieldInSchema(ExtendedDismaxQParser.java:273)
	... 46 more