diff --git a/.vscode/extensions.json b/.vscode/extensions.json
deleted file mode 100644
index 50f889140042..000000000000
--- a/.vscode/extensions.json
+++ /dev/null
@@ -1,3 +0,0 @@
-{
-    "recommendations": [ "dbaeumer.vscode-eslint", "stylelint.vscode-stylelint" ]
-}
diff --git a/.vscode/launch.json b/.vscode/launch.json
deleted file mode 100644
index 308ed8467bde..000000000000
--- a/.vscode/launch.json
+++ /dev/null
@@ -1,23 +0,0 @@
-{
-  // Use IntelliSense to learn about possible Node.js debug attributes.
-  // Hover to view descriptions of existing attributes.
-  // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-  "version": "0.2.0",
-  "configurations": [
-    {
-      "type": "node",
-      "request": "launch",
-      "name": "Jest Tests",
-      "program": "${workspaceRoot}/node_modules/jest/bin/jest.js",
-      "args": [
-        "--runInBand",
-        "--no-cache"
-      ],
-      "runtimeArgs": [
-        "--harmony"
-      ],
-      "sourceMaps": true,
-      "cwd": "${workspaceRoot}"
-    },
-  ]
-}
diff --git a/.vscode/settings.json b/.vscode/settings.json
deleted file mode 100644
index dc8891d543ca..000000000000
--- a/.vscode/settings.json
+++ /dev/null
@@ -1,5 +0,0 @@
-{
-    "editor.codeActionsOnSave": {
-        "source.fixAll.eslint": true
-    }
-}
\ No newline at end of file
diff --git a/js/data/array_utils.js b/js/data/array_utils.js
index e32aace0d649..290f2282d2a4 100644
--- a/js/data/array_utils.js
+++ b/js/data/array_utils.js
@@ -87,7 +87,7 @@ function createObjectWithChanges(target, changes) {
     return deepExtendArraySafe(result, changes, true, true);
 }
 
-function applyBatch({ keyInfo, data, changes, groupCount, useInsertIndex, immutable, disableCache }) {
+function applyBatch({ keyInfo, data, changes, groupCount, useInsertIndex, immutable, disableCache, logError }) {
     const resultItems = immutable === true ? [...data] : data;
 
     changes.forEach(item => {
@@ -96,16 +96,16 @@ function applyBatch({ keyInfo, data, changes, groupCount, useInsertIndex, immuta
         !disableCache && generateDataByKeyMap(keyInfo, items);
 
         switch(item.type) {
-            case 'update': update(keyInfo, items, item.key, item.data, true, immutable); break;
-            case 'insert': insert(keyInfo, items, item.data, useInsertIndex && isDefined(item.index) ? item.index : -1, true); break;
-            case 'remove': remove(keyInfo, items, item.key, true); break;
+            case 'update': update(keyInfo, items, item.key, item.data, true, immutable, logError); break;
+            case 'insert': insert(keyInfo, items, item.data, useInsertIndex && isDefined(item.index) ? item.index : -1, true, logError); break;
+            case 'remove': remove(keyInfo, items, item.key, true, logError); break;
         }
     });
     return resultItems;
 }
 
-function getErrorResult(isBatch, errorCode) {
-    return !isBatch ? rejectedPromise(errors.Error(errorCode)) : errors.log(errorCode);
+function getErrorResult(isBatch, logError, errorCode) {
+    return !isBatch ? rejectedPromise(errors.Error(errorCode)) : logError && errors.log(errorCode);
 }
 
 function applyChanges(data, changes, options = {}) {
@@ -121,25 +121,26 @@ function applyChanges(data, changes, options = {}) {
         data,
         changes,
         immutable,
-        disableCache: true
+        disableCache: true,
+        logError: true
     });
 }
 
-function update(keyInfo, array, key, data, isBatch, immutable) {
+function update(keyInfo, array, key, data, isBatch, immutable, logError) {
     let target;
     const extendComplexObject = true;
     const keyExpr = keyInfo.key();
 
     if(keyExpr) {
         if(hasKey(data, keyExpr) && !keysEqual(keyExpr, key, keyInfo.keyOf(data))) {
-            return getErrorResult(isBatch, 'E4017');
+            return getErrorResult(isBatch, logError, 'E4017');
         }
 
         target = getCacheValue(array, key);
         if(!target) {
             const index = indexByKey(keyInfo, array, key);
             if(index < 0) {
-                return getErrorResult(isBatch, 'E4009');
+                return getErrorResult(isBatch, logError, 'E4009');
             }
 
             target = array[index];
@@ -164,7 +165,7 @@ function update(keyInfo, array, key, data, isBatch, immutable) {
     }
 }
 
-function insert(keyInfo, array, data, index, isBatch) {
+function insert(keyInfo, array, data, index, isBatch, logError) {
     let keyValue;
     const keyExpr = keyInfo.key();
 
@@ -179,7 +180,7 @@ function insert(keyInfo, array, data, index, isBatch) {
             keyValue = obj[keyExpr] = String(new Guid());
         } else {
             if(array[indexByKey(keyInfo, array, keyValue)] !== undefined) {
-                return getErrorResult(isBatch, 'E4008');
+                return getErrorResult(isBatch, logError, 'E4008');
             }
         }
     } else {
@@ -198,7 +199,7 @@ function insert(keyInfo, array, data, index, isBatch) {
     }
 }
 
-function remove(keyInfo, array, key, isBatch) {
+function remove(keyInfo, array, key, isBatch, logError) {
     const index = indexByKey(keyInfo, array, key);
     if(index > -1) {
         array.splice(index, 1);
@@ -206,7 +207,7 @@ function remove(keyInfo, array, key, isBatch) {
     if(!isBatch) {
         return trivialPromise(key);
     } else if(index < 0) {
-        return getErrorResult(isBatch, 'E4009');
+        return getErrorResult(isBatch, logError, 'E4009');
     }
 }
 
diff --git a/js/localization/messages/fi.json b/js/localization/messages/fi.json
index 6e445ca4974b..52d347dc2de3 100644
--- a/js/localization/messages/fi.json
+++ b/js/localization/messages/fi.json
@@ -77,7 +77,7 @@
         "dxSwitch-switchedOffText": "POIS",
 
         "dxForm-optionalMark": "valinnainen",
-        "dxForm-requiredMessage": "{0} on valinnainen",
+        "dxForm-requiredMessage": "{0} on pakollinen",
 
         "dxNumberBox-invalidValueMessage": "Arvon on oltava numero",
         "dxNumberBox-noDataText": "Ei dataa",
diff --git a/testing/tests/DevExpress.data/applyChanges.tests.js b/testing/tests/DevExpress.data/applyChanges.tests.js
index 9a223327dd00..c695345634ae 100644
--- a/testing/tests/DevExpress.data/applyChanges.tests.js
+++ b/testing/tests/DevExpress.data/applyChanges.tests.js
@@ -1,6 +1,7 @@
 import { extend } from 'core/utils/extend';
 import { errors } from 'data/errors';
 import applyChanges from 'data/apply_changes';
+import { applyBatch } from 'data/array_utils';
 
 QUnit.module('Apply Changes', {
     beforeEach: function() {
@@ -164,5 +165,66 @@ QUnit.module('Apply Changes', {
         assert.equal(errorsLogSpy.getCall(0).args[0], 'E4008', 'insert error');
         assert.equal(errorsLogSpy.getCall(1).args[0], 'E4009', 'remove error');
         assert.equal(errorsLogSpy.getCall(2).args[0], 'E4009', 'update error');
+
+        errorsLogSpy.restore();
+    });
+
+    QUnit.test('applyBatch should not log errors when the logError parameter is not set to true', function(assert) {
+        // arrange
+        this.data = [
+            {
+                id: 1,
+                name: 'test1'
+            },
+            {
+                id: 2,
+                name: 'test2'
+            },
+            {
+                id: 3,
+                name: 'test3'
+            },
+            {
+                id: 4,
+                name: 'test4'
+            },
+            {
+                id: 5,
+                name: 'test5'
+            }
+        ];
+        this.changes = [
+            {
+                type: 'insert',
+                data: {
+                    id: 5,
+                    name: 'test new'
+                }
+            },
+            {
+                type: 'remove',
+                key: 6
+            },
+            {
+                type: 'update',
+                key: 7,
+                data: {
+                    name: 'new name'
+                }
+            }
+        ];
+        const keyInfo = {
+            key: () => 'id',
+            keyOf: (obj) => obj.id
+        };
+        const errorsLogSpy = sinon.spy(errors, 'log');
+
+        // act
+        applyBatch({ keyInfo, data: this.data, changes: this.changes });
+
+        // assert
+        assert.equal(errorsLogSpy.callCount, 0, 'error.log should not be called');
+
+        errorsLogSpy.restore();
     });
 });