diff --git a/backend/src/main/java/de/bund/digitalservice/ris/caselaw/adapter/DatabaseDuplicateCheckService.java b/backend/src/main/java/de/bund/digitalservice/ris/caselaw/adapter/DatabaseDuplicateCheckService.java
index a6ed1e5ef3..e86157d780 100644
--- a/backend/src/main/java/de/bund/digitalservice/ris/caselaw/adapter/DatabaseDuplicateCheckService.java
+++ b/backend/src/main/java/de/bund/digitalservice/ris/caselaw/adapter/DatabaseDuplicateCheckService.java
@@ -20,6 +20,8 @@
 import java.util.Optional;
 import java.util.UUID;
 import lombok.extern.slf4j.Slf4j;
+import net.javacrumbs.shedlock.spring.annotation.SchedulerLock;
+import org.springframework.scheduling.annotation.Scheduled;
 import org.springframework.stereotype.Service;
 
 @Service
@@ -70,8 +72,8 @@ public void checkDuplicates(String docNumber) {
   }
 
   // Runs every night at 05:05:10
-  //  @Scheduled(cron = "10 5 5 * * *")
-  //  @SchedulerLock(name = "duplicate-check-job", lockAtMostFor = "PT15M")
+  @Scheduled(cron = "10 5 5 * * *")
+  @SchedulerLock(name = "duplicate-check-job", lockAtMostFor = "PT15M")
   @Transactional
   @Override
   public void checkAllDuplicates() {