diff --git a/common/core/src/main/java/org/kaaproject/kaa/server/common/core/algorithms/AvroUtils.java b/common/core/src/main/java/org/kaaproject/kaa/server/common/core/algorithms/AvroUtils.java
index fc07a71602..c1039f35a2 100644
--- a/common/core/src/main/java/org/kaaproject/kaa/server/common/core/algorithms/AvroUtils.java
+++ b/common/core/src/main/java/org/kaaproject/kaa/server/common/core/algorithms/AvroUtils.java
@@ -16,10 +16,6 @@
 
 package org.kaaproject.kaa.server.common.core.algorithms;
 
-import static org.kaaproject.kaa.server.common.core.algorithms.CommonConstants.KAA_NAMESPACE;
-import static org.kaaproject.kaa.server.common.core.algorithms.CommonConstants.UUID_SIZE;
-import static org.kaaproject.kaa.server.common.core.algorithms.CommonConstants.UUID_TYPE;
-
 import java.nio.ByteBuffer;
 import java.util.List;
 import java.util.Map;
@@ -30,6 +26,10 @@
 import org.apache.avro.Schema.Type;
 import org.apache.avro.generic.GenericData;
 import org.codehaus.jackson.JsonNode;
+import org.codehaus.jackson.node.ArrayNode;
+import org.codehaus.jackson.node.ObjectNode;
+
+import static org.kaaproject.kaa.server.common.core.algorithms.CommonConstants.*;
 
 public class AvroUtils {
 
@@ -92,4 +92,38 @@ public static void copyJsonProperties(JsonProperties src, JsonProperties dst) {
         }
     }
 
+
+    public static JsonNode injectUuids(JsonNode json) {
+        boolean containerWithoutId = json.isContainerNode() && !json.has(UUID_FIELD);
+        boolean notArray = !(json instanceof ArrayNode);
+        boolean childIsNotArray = !(json.size() == 1 && json.getElements().next() instanceof ArrayNode);
+
+        if (containerWithoutId && notArray && childIsNotArray) {
+            ((ObjectNode)json).put(UUID_FIELD, (Integer)null);
+        }
+
+        for (JsonNode node : json) {
+            if (node.isContainerNode())
+                injectUuids(node);
+        }
+
+        return json;
+    }
+
+    public static JsonNode removeUuids(JsonNode json) {
+        boolean containerWithId = json.isContainerNode() && json.has(UUID_FIELD);
+        boolean isArray = json.isArray();
+        boolean childIsNotArray = !(json.size() == 1 && json.getElements().next().isArray());
+
+        if (containerWithId && !isArray && childIsNotArray) {
+            ((ObjectNode)json).remove(UUID_FIELD);
+        }
+
+        for (JsonNode node : json) {
+            if (node.isContainerNode())
+                injectUuids(node);
+        }
+
+        return json;
+    }
 }
diff --git a/server/node/src/main/java/org/kaaproject/kaa/server/admin/services/KaaAdminServiceImpl.java b/server/node/src/main/java/org/kaaproject/kaa/server/admin/services/KaaAdminServiceImpl.java
index bd521a0117..849382d434 100644
--- a/server/node/src/main/java/org/kaaproject/kaa/server/admin/services/KaaAdminServiceImpl.java
+++ b/server/node/src/main/java/org/kaaproject/kaa/server/admin/services/KaaAdminServiceImpl.java
@@ -129,6 +129,7 @@
 import org.kaaproject.kaa.server.admin.shared.services.KaaAdminService;
 import org.kaaproject.kaa.server.admin.shared.services.KaaAdminServiceException;
 import org.kaaproject.kaa.server.admin.shared.services.ServiceErrorCode;
+import org.kaaproject.kaa.server.common.core.algorithms.AvroUtils;
 import org.kaaproject.kaa.server.common.core.schema.KaaSchemaFactoryImpl;
 import org.kaaproject.kaa.server.common.dao.exception.NotFoundException;
 import org.kaaproject.kaa.server.common.plugin.KaaPluginConfig;
@@ -2568,7 +2569,7 @@ public RecordField getConfigurationRecordDataFromFile(String schema, String file
             byte[] body = getFileContent(fileItemName);
 
             JsonNode json = new ObjectMapper().readTree(body);
-            json = injectUuids(json);
+            json = AvroUtils.injectUuids(json);
             body = json.toString().getBytes();
 
             GenericAvroConverter<GenericRecord> converter = new GenericAvroConverter<>(schema);
@@ -2580,22 +2581,7 @@ public RecordField getConfigurationRecordDataFromFile(String schema, String file
         }
     }
 
-    private JsonNode injectUuids(JsonNode json) {
-        boolean containerWithoutId = json.isContainerNode() && !json.has("__uuid");
-        boolean notArray = !(json instanceof ArrayNode);
-        boolean childIsNotArray = !(json.size() == 1 && json.getElements().next() instanceof ArrayNode);
 
-        if (containerWithoutId && notArray && childIsNotArray) {
-            ((ObjectNode)json).put("__uuid", (Integer)null);
-        }
-
-        for (JsonNode node : json) {
-            if (node.isContainerNode())
-                injectUuids(node);
-        }
-
-        return json;
-    }
 
     private void checkExpiredDate(NotificationDto notification) throws KaaAdminServiceException {
         if (null != notification.getExpiredAt() && notification.getExpiredAt().before(new Date())) {
diff --git a/server/node/src/main/java/org/kaaproject/kaa/server/operations/service/delta/DefaultDeltaService.java b/server/node/src/main/java/org/kaaproject/kaa/server/operations/service/delta/DefaultDeltaService.java
index cae00bbb45..183e031bc2 100644
--- a/server/node/src/main/java/org/kaaproject/kaa/server/operations/service/delta/DefaultDeltaService.java
+++ b/server/node/src/main/java/org/kaaproject/kaa/server/operations/service/delta/DefaultDeltaService.java
@@ -24,6 +24,8 @@
 import java.util.List;
 
 import org.apache.commons.lang.StringUtils;
+import org.codehaus.jackson.JsonNode;
+import org.codehaus.jackson.map.ObjectMapper;
 import org.kaaproject.kaa.common.avro.GenericAvroConverter;
 import org.kaaproject.kaa.common.dto.ConfigurationDto;
 import org.kaaproject.kaa.common.dto.ConfigurationSchemaDto;
@@ -36,6 +38,7 @@
 import org.kaaproject.kaa.common.endpoint.security.MessageEncoderDecoder;
 import org.kaaproject.kaa.common.hash.EndpointObjectHash;
 import org.kaaproject.kaa.server.common.Base64Util;
+import org.kaaproject.kaa.server.common.core.algorithms.AvroUtils;
 import org.kaaproject.kaa.server.common.core.algorithms.delta.BaseBinaryDelta;
 import org.kaaproject.kaa.server.common.core.algorithms.override.OverrideAlgorithm;
 import org.kaaproject.kaa.server.common.core.algorithms.override.OverrideAlgorithmFactory;
@@ -230,7 +233,7 @@ public ConfigurationCacheEntry compute(DeltaCacheKey deltaKey) {
                             LOG.debug("[{}] Configuration hash for {} is {}", endpointId, deltaKey,
                                     MessageEncoderDecoder.bytesToHex(deltaCache.getHash().getData()));
                             return deltaCache;
-                        } catch (GetDeltaException e) {
+                        } catch (GetDeltaException | IOException e) {
                             throw new RuntimeException(e); // NOSONAR
                         }
                     }
@@ -356,9 +359,10 @@ public BaseData compute(List<EndpointGroupStateDto> key) {
         return mergedConfiguration;
     }
 
-    private ConfigurationCacheEntry buildBaseResyncDelta(String endpointId, RawData mergedConfiguration, EndpointObjectHash userConfigurationHash) {
-        byte[] configuration = GenericAvroConverter.toRawData(mergedConfiguration.getRawData(), mergedConfiguration.getSchema()
-                .getRawSchema());
+    private ConfigurationCacheEntry buildBaseResyncDelta(String endpointId, RawData rawMergedConf, EndpointObjectHash userConfigurationHash) throws IOException {
+        JsonNode json = new ObjectMapper().readTree(rawMergedConf.getRawData());
+        json = AvroUtils.removeUuids(json);
+        byte[] configuration = GenericAvroConverter.toRawData(json.toString(), rawMergedConf.getSchema().getRawSchema());
         return new ConfigurationCacheEntry(configuration, new BaseBinaryDelta(configuration), EndpointObjectHash.fromSHA1(configuration),
                 userConfigurationHash);
     }