diff --git a/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/model/sql/EventClass.java b/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/model/sql/EventClass.java
index bf7fe2bd0c..105c05371d 100644
--- a/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/model/sql/EventClass.java
+++ b/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/model/sql/EventClass.java
@@ -62,10 +62,6 @@ public EventClass(EventClassDto dto) {
         if (tenantId != null) {
             this.tenant = new Tenant(tenantId);
         }
-        Long ecfId = getLongId(dto.getEcfId());
-        if (ecfId != null) {
-            this.ecf = new EventClassFamilyVersion(ecfId);
-        }
         this.fqn = dto.getFqn();
         this.type = dto.getType();
     }
diff --git a/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/model/sql/EventClassFamily.java b/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/model/sql/EventClassFamily.java
index fea06a8b8d..09d112d91b 100644
--- a/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/model/sql/EventClassFamily.java
+++ b/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/model/sql/EventClassFamily.java
@@ -72,7 +72,7 @@ public class EventClassFamily extends GenericModel<EventClassFamilyDto> {
     protected long createdTime;
 
     @OneToMany(cascade = CascadeType.ALL)
-    @JoinColumn(name = EVENT_CLASS_FAMILY_VERSION_EVENT_CLASS_FAMILY_ID)
+    @JoinColumn(name = EVENT_CLASS_FAMILY_VERSION_EVENT_CLASS_FAMILY_ID, nullable = false)
     private List<EventClassFamilyVersion> schemas;
 
     public EventClassFamily() {
diff --git a/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/model/sql/EventClassFamilyVersion.java b/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/model/sql/EventClassFamilyVersion.java
index 42de4ca8c1..1539337d53 100644
--- a/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/model/sql/EventClassFamilyVersion.java
+++ b/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/model/sql/EventClassFamilyVersion.java
@@ -36,7 +36,7 @@ public class EventClassFamilyVersion extends GenericModel<EventClassFamilyVersio
     private static final long serialVersionUID = -7490111487256831990L;
 
     @OneToMany(cascade = CascadeType.ALL)
-    @JoinColumn(name = EVENT_CLASS_EVENT_CLASS_FAMILY_VERSION_ID)
+    @JoinColumn(name = EVENT_CLASS_EVENT_CLASS_FAMILY_VERSION_ID, nullable = false)
     private List<EventClass> records;
 
     @Column(name = EVENT_CLASS_FAMILY_VERSION_VERSION)
diff --git a/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/service/EventClassServiceImpl.java b/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/service/EventClassServiceImpl.java
index dee68cf6dd..b8be2466c0 100644
--- a/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/service/EventClassServiceImpl.java
+++ b/server/common/dao/src/main/java/org/kaaproject/kaa/server/common/dao/service/EventClassServiceImpl.java
@@ -26,6 +26,7 @@
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
+import java.util.stream.Collectors;
 
 import org.apache.commons.lang.StringUtils;
 import org.kaaproject.avro.ui.shared.NamesValidator;
@@ -163,9 +164,10 @@ public int compare(EventClassFamilyVersionDto o1,
                 EventClassFamily ecf = new EventClassFamily(eventClassFamily);
                 List<EventClassFamilyVersion> schemas = new ArrayList<>();
                 for (EventClassDto eventClass : records) {
-                    saveEventClass(eventClassFamily, eventClass, version);
+                    setEventClassProperties(eventClassFamily, eventClass, version);
                 }
                 schemasDto.forEach(s -> schemas.add(new EventClassFamilyVersion(s)));
+                setEventClassECF(schemas);
                 ecf.setSchemas(schemas);
                 eventClassFamilyDao.save(ecf);
             } else {
@@ -178,11 +180,14 @@ public int compare(EventClassFamilyVersionDto o1,
         }
     }
 
-    private void saveEventClass(EventClassFamilyDto eventClassFamilyDto, EventClassDto eventClass, int version) {
+    private void setEventClassProperties(EventClassFamilyDto eventClassFamilyDto, EventClassDto eventClass, int version) {
         eventClass.setTenantId(eventClassFamilyDto.getTenantId());
         eventClass.setEcfId(eventClassFamilyDto.getId());
         eventClass.setVersion(version);
-        //eventClassDao.save(new EventClass(eventClass));
+    }
+
+    private void setEventClassECF(List<EventClassFamilyVersion> ecfvList) {
+        ecfvList.forEach(ecfv -> ecfv.getRecords().forEach(ec -> ec.setEcf(ecfv)));
     }
 
     private boolean validateEventClassFamilyFqns(EventClassFamilyDto eventClassFamily, List<String> fqns) {
@@ -194,7 +199,9 @@ public List<EventClassDto> findEventClassesByFamilyIdVersionAndType(String ecfId
         List<EventClassDto> eventClasses;
         if (isValidSqlId(ecfId)) {
             LOG.debug("Find event classes by family id [{}] version [{}] and type [{}]", ecfId, version, type);
-            eventClasses = convertDtoList(eventClassDao.findByEcfIdVersionAndType(ecfId, version, type));
+            EventClassFamily ecf = eventClassFamilyDao.findById(ecfId);
+            EventClassFamilyVersion ecfv = ecf.getSchemas().stream().filter(s -> s.getVersion() == version).collect(Collectors.toList()).get(0);
+            eventClasses = convertDtoList(eventClassDao.findByEcfIdVersionAndType(String.valueOf(ecfv.getId()), ecfv.getVersion(), type));
         } else {
             throw new IncorrectParameterException("Incorrect event class family id: " + ecfId);
         }
diff --git a/server/node/src/test/java/org/kaaproject/kaa/server/control/AbstractTestControlServer.java b/server/node/src/test/java/org/kaaproject/kaa/server/control/AbstractTestControlServer.java
index f3618af413..4493def15b 100644
--- a/server/node/src/test/java/org/kaaproject/kaa/server/control/AbstractTestControlServer.java
+++ b/server/node/src/test/java/org/kaaproject/kaa/server/control/AbstractTestControlServer.java
@@ -292,7 +292,6 @@ protected void clearDBData() {
             if (url.contains("h2")) {
                 LOG.info("Deleting data from H2 database");
                 new H2DBTestRunner().truncateTables(dataSource);
-                new H2DBTestRunner().truncateSequences(dataSource);
             } else {
                 LOG.info("Deleting data from PostgreSQL database");
                 new PostgreDBTestRunner().truncateTables(dataSource);
diff --git a/server/node/src/test/java/org/kaaproject/kaa/server/control/ControlServerEventClassFamilyIT.java b/server/node/src/test/java/org/kaaproject/kaa/server/control/ControlServerEventClassFamilyIT.java
index a19079e34d..04ec753ae3 100644
--- a/server/node/src/test/java/org/kaaproject/kaa/server/control/ControlServerEventClassFamilyIT.java
+++ b/server/node/src/test/java/org/kaaproject/kaa/server/control/ControlServerEventClassFamilyIT.java
@@ -134,8 +134,9 @@ public void testGetEventClassesByFamilyIdVersionAndType() throws Exception {
         List<EventClassDto> eventClasses = client.getEventClassesByFamilyIdVersionAndType(eventClassFamily.getId(), 1, EventClassType.EVENT);
         Assert.assertNotNull(eventClasses);
         Assert.assertEquals(1, eventClasses.size());
+        eventClassFamilyVersion = client.getEventClassFamilyVersionsById(eventClassFamily.getId()).get(0);
         for (EventClassDto eventClass : eventClasses) {
-            Assert.assertEquals(eventClassFamily.getId(), eventClass.getEcfId());
+            Assert.assertEquals(eventClassFamilyVersion.getId(), eventClass.getEcfId());
             Assert.assertEquals(0, eventClass.getVersion());
         }
     }