diff --git a/src/java/main/esg/search/publish/impl/solr/SolrRetractor.java b/src/java/main/esg/search/publish/impl/solr/SolrRetractor.java
index fbcde1da..330fc409 100644
--- a/src/java/main/esg/search/publish/impl/solr/SolrRetractor.java
+++ b/src/java/main/esg/search/publish/impl/solr/SolrRetractor.java
@@ -86,7 +86,7 @@ public void consume(final Record record) throws Exception {
 
 		metadata.put(QueryParameters.FIELD_RETRACTED, new String[] {"true"} );
 		metadata.put(QueryParameters.FIELD_LATEST, new String[] {"false"} );
-        metadata.put(QueryParameters.FIELD_TIMESTAMP, new String[] {DateTimeFormatter.ISO_INSTANT.format(thedate)} );
+        metadata.put(QueryParameters.FIELD_TIMESTAMP_, new String[] {DateTimeFormatter.ISO_INSTANT.format(thedate)} );
 		HashMap<String, Map<String,String[]>> doc = new HashMap<String, Map<String,String[]>>();
 		doc.put(query, metadata);
 	    updateService.update(solrUrl.toString(),