diff --git a/backend/src/main/java/org/raddatz/familienarchiv/service/AnnotationService.java b/backend/src/main/java/org/raddatz/familienarchiv/service/AnnotationService.java
index e43b78b5..7616a9a0 100644
--- a/backend/src/main/java/org/raddatz/familienarchiv/service/AnnotationService.java
+++ b/backend/src/main/java/org/raddatz/familienarchiv/service/AnnotationService.java
@@ -1,6 +1,7 @@
 package org.raddatz.familienarchiv.service;
 
 import lombok.RequiredArgsConstructor;
+import lombok.extern.slf4j.Slf4j;
 import org.raddatz.familienarchiv.dto.CreateAnnotationDTO;
 import org.raddatz.familienarchiv.dto.UpdateAnnotationDTO;
 import org.raddatz.familienarchiv.exception.DomainException;
@@ -8,12 +9,14 @@ import org.raddatz.familienarchiv.exception.ErrorCode;
 import org.raddatz.familienarchiv.model.DocumentAnnotation;
 import org.raddatz.familienarchiv.repository.AnnotationRepository;
 import org.raddatz.familienarchiv.repository.TranscriptionBlockRepository;
+import org.springframework.dao.DataIntegrityViolationException;
 import org.springframework.stereotype.Service;
 import org.springframework.transaction.annotation.Transactional;
 
 import java.util.List;
 import java.util.UUID;
 
+@Slf4j
 @Service
 @RequiredArgsConstructor
 public class AnnotationService {
@@ -74,7 +77,12 @@ public class AnnotationService {
         if (dto.getWidth() != null) annotation.setWidth(dto.getWidth());
         if (dto.getHeight() != null) annotation.setHeight(dto.getHeight());
 
-        return annotationRepository.save(annotation);
+        try {
+            return annotationRepository.save(annotation);
+        } catch (DataIntegrityViolationException e) {
+            log.warn("Annotation bounds constraint violated for {}: {}", annotationId, e.getMessage());
+            throw DomainException.badRequest(ErrorCode.ANNOTATION_UPDATE_FAILED, "Bounds out of range");
+        }
     }
 
     @Transactional