diff --git a/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/service/DictionaryRecordService.java b/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/service/DictionaryRecordService.java
index 3057c93..4dfc784 100644
--- a/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/service/DictionaryRecordService.java
+++ b/ordinis-rest-api/src/main/java/cloud/nstart/terravault/ordinis/restapi/service/DictionaryRecordService.java
@@ -115,7 +115,10 @@ public class DictionaryRecordService {
     UUID previousRecordId = current.getId();
 
     current.setValidTo(newValidFrom);
-    repository.save(current);
+    // saveAndFlush обязателен: иначе Hibernate отложит UPDATE до commit, INSERT новой
+    // записи пойдёт первым → exclusion constraint dictionary_records_no_overlap бьёт,
+    // т.к. старая ещё имеет valid_to=FAR_FUTURE и tstzrange'и пересекаются.
+    repository.saveAndFlush(current);
 
     var next = new DictionaryRecord(
         UUID.randomUUID(),