diff --git a/src/main/java/net/hostsharing/hsadminng/mapper/Mapper.java b/src/main/java/net/hostsharing/hsadminng/mapper/Mapper.java
index a8e25b4b..b16db84b 100644
--- a/src/main/java/net/hostsharing/hsadminng/mapper/Mapper.java
+++ b/src/main/java/net/hostsharing/hsadminng/mapper/Mapper.java
@@ -1,8 +1,6 @@
 package net.hostsharing.hsadminng.mapper;
 
 import org.modelmapper.ModelMapper;
-import org.modelmapper.convention.MatchingStrategies;
-import org.modelmapper.spi.MatchingStrategy;
 import org.springframework.util.ReflectionUtils;
 
 import jakarta.persistence.EntityManager;
@@ -10,8 +8,6 @@ import jakarta.persistence.ManyToOne;
 import jakarta.persistence.PersistenceContext;
 import jakarta.validation.ValidationException;
 import java.lang.reflect.Field;
-import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 import java.util.function.BiConsumer;
 import java.util.stream.Collectors;
@@ -30,9 +26,7 @@ public class Mapper extends ModelMapper {
     EntityManager em;
 
     public Mapper() {
-        getConfiguration().setAmbiguityIgnored(true);
-//        getConfiguration().setMatchingStrategy(STRICT);
-//        getConfiguration().setDeepCopyEnabled(true);
+        getConfiguration().setMatchingStrategy(STRICT);
     }
 
     public <S, T> List<T> mapList(final List<S> source, final Class<T> targetClass) {