diff --git a/src/elastic-search/configuration/datasetFieldMapping.ts b/src/elastic-search/configuration/datasetFieldMapping.ts
index 054b2f57d..3bb571441 100644
--- a/src/elastic-search/configuration/datasetFieldMapping.ts
+++ b/src/elastic-search/configuration/datasetFieldMapping.ts
@@ -29,7 +29,6 @@ export const datasetMappings: MappingObject = {
   },
   creationTime: {
     type: "date",
-    ignore_above: 256,
   },
   scientificMetadata: {
     type: "nested",