An error occurred while attaching module (Dynamicweb.Frontend.Content)

System.ArgumentException: The given field name does not exist in the given index schema. Field: 'SearchField', Index: 'Users.index'.
   at Dynamicweb.Indexing.Lucene.Helpers.ParseQueryExpressionInternal(IIndex index, Expression expression, Analyzer analyzer, QuerySettings settings)
   at Dynamicweb.Indexing.Lucene.Helpers.ParseQueryExpressionInternal(IIndex index, Expression expression, Analyzer analyzer, QuerySettings settings)
   at Dynamicweb.Indexing.Lucene.Helpers.ParseQueryExpressionInternal(IIndex index, Expression expression, Analyzer analyzer, QuerySettings settings)
   at Dynamicweb.Indexing.Lucene.LuceneIndexProvider.CollectorSearch(IndexReader reader, SortedSetDocValuesReaderState readerState, IQuery query, FieldDefinitionBase[] fields, Sort sort, QuerySettings settings, Action`1 logTiming)
   at Dynamicweb.Indexing.Lucene.LuceneIndexProvider.SearchInternal(IQuery query, QuerySettings settings)
   at Dynamicweb.Indexing.Queries.IndexQueryProvider.Query(IQuery query, QuerySettings settings)
   at Dynamicweb.Indexing.Querying.QueryService.Query(IQuery query, QuerySettings settings)
   at Dynamicweb.QueryPublisher.Frontend.GetModuleContent()
   at Dynamicweb.Frontend.Content.GetModuleOutput(Paragraph paragraph, PageView pageview)