diff --git a/sci-types-department/src/main/java/org/scientificcms/contenttypes/scidepartment/ContactImExporter.java b/sci-types-department/src/main/java/org/scientificcms/contenttypes/scidepartment/ContactImExporter.java
index 045b227..4085837 100644
--- a/sci-types-department/src/main/java/org/scientificcms/contenttypes/scidepartment/ContactImExporter.java
+++ b/sci-types-department/src/main/java/org/scientificcms/contenttypes/scidepartment/ContactImExporter.java
@@ -1,5 +1,7 @@
 package org.scientificcms.contenttypes.scidepartment;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.libreccm.imexport.AbstractEntityImExporter;
 import org.libreccm.imexport.Processes;
 import org.librecms.assets.Organization;
@@ -22,6 +24,10 @@ import javax.transaction.Transactional;
 @Processes(Contact.class)
 public class ContactImExporter
     extends AbstractEntityImExporter<Contact> {
+    
+    private static final Logger LOGGER = LogManager.getLogger(
+        ContactImExporter.class
+    );
 
     @Inject
     private ContactRepository contactRepo;
@@ -46,6 +52,11 @@ public class ContactImExporter
     @Override
     @Transactional(Transactional.TxType.REQUIRED)
     protected void saveImportedEntity(final Contact entity) {
+        LOGGER.info(
+            "Saving {}: {}", 
+            entity.getClass().getName(),
+            Objects.toString(entity)
+        );
         contactRepo.save(entity);
     }
 
diff --git a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Contact.java b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Contact.java
index d7b0af6..0b237e1 100644
--- a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Contact.java
+++ b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/Contact.java
@@ -41,7 +41,6 @@ public class Contact implements Exportable, Serializable {
     @GeneratedValue(strategy = GenerationType.AUTO)
     private long contactId;
 
-    @Id
     @Column(name = "uuid", unique = true, nullable = false)
     private String uuid;
 
diff --git a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/ContactImExporter.java b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/ContactImExporter.java
index db6599c..3af13cd 100644
--- a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/ContactImExporter.java
+++ b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/ContactImExporter.java
@@ -1,5 +1,7 @@
 package org.scientificcms.contenttypes.sciproject;
 
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.libreccm.imexport.AbstractEntityImExporter;
 import org.libreccm.imexport.Processes;
 import org.librecms.assets.Organization;
@@ -23,6 +25,10 @@ import javax.transaction.Transactional;
 @Processes(Contact.class)
 public class ContactImExporter
     extends AbstractEntityImExporter<Contact> {
+    
+    private static final Logger LOGGER = LogManager.getLogger(
+        ContactImExporter.class
+    );
 
     @Inject
     private ContactRepository contactRepo;
@@ -50,10 +56,7 @@ public class ContactImExporter
     @Override
     @Transactional(Transactional.TxType.REQUIRED)
     protected void saveImportedEntity(final Contact entity) {
-        final SciProject project = entity.getProject();
-        project.addContact(entity);
         contactRepo.save(entity);
-        itemRepo.save(project);
     }
 
     @Override
diff --git a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/MembershipImExporter.java b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/MembershipImExporter.java
index ea73d9b..71f6981 100644
--- a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/MembershipImExporter.java
+++ b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/MembershipImExporter.java
@@ -48,10 +48,7 @@ public class MembershipImExporter
     @Override
     @Transactional(Transactional.TxType.REQUIRED)
     protected void saveImportedEntity(final Membership entity) {
-        final SciProject project = entity.getProject();
-        project.addMember(entity);
         membershipRepo.save(entity);
-        itemRepo.save(project);
     }
 
     @Override
diff --git a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SciProjectIdResolver.java b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SciProjectIdResolver.java
index a81b8e0..5b43229 100644
--- a/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SciProjectIdResolver.java
+++ b/sci-types-project/src/main/java/org/scientificcms/contenttypes/sciproject/SciProjectIdResolver.java
@@ -30,7 +30,7 @@ public class SciProjectIdResolver implements Serializable, ObjectIdResolver {
 
     @Override
     public Object resolveId(final ObjectIdGenerator.IdKey id) {
-        return CdiUtil
+        final SciProject project = CdiUtil
             .createCdiUtil()
             .findBean(ContentItemRepository.class)
             .findByUuid(id.key.toString(), SciProject.class)
@@ -42,6 +42,18 @@ public class SciProjectIdResolver implements Serializable, ObjectIdResolver {
                     )
                 )
             );
+        return CdiUtil
+            .createCdiUtil()
+            .findBean(ContentItemRepository.class)
+            .findByUuid(id.key.toString(), SciProject.class)
+            .orElseThrow(
+                () -> new IllegalArgumentException(
+                    String.format(
+                        "No SciProject with UUID %s found in the database.",
+                        id.key.toString()
+                    )
+                )
+            );
     }
 
     @Override