diff --git a/packages/nodes-base/nodes/MongoDb/GenericFunctions.test.ts b/packages/nodes-base/nodes/MongoDb/GenericFunctions.test.ts
new file mode 100644
index 0000000000..73bf1dcc6f
--- /dev/null
+++ b/packages/nodes-base/nodes/MongoDb/GenericFunctions.test.ts
@@ -0,0 +1,80 @@
+import { prepareItems } from './GenericFunctions';
+
+describe('MongoDB Node: Generic Functions', () => {
+	describe('prepareItems', () => {
+		it('should select fields', () => {
+			const items = [{ json: { name: 'John', age: 30 } }, { json: { name: 'Jane', age: 25 } }];
+			const fields = ['name'];
+
+			const result = prepareItems({ items, fields });
+
+			expect(result).toEqual([{ name: 'John' }, { name: 'Jane' }]);
+		});
+
+		it('should add updateKey to selected fields', () => {
+			const items = [{ json: { name: 'John', age: 30 } }, { json: { name: 'Jane', age: 25 } }];
+			const fields = ['age'];
+			const updateKey = 'name';
+
+			const result = prepareItems({ items, fields, updateKey });
+
+			expect(result).toEqual([
+				{ name: 'John', age: 30 },
+				{ name: 'Jane', age: 25 },
+			]);
+		});
+
+		it('should handle dot notation', () => {
+			const items = [{ json: { user: { name: 'John' } } }, { json: { user: { name: 'Jane' } } }];
+			const fields = ['user.name'];
+			const useDotNotation = true;
+
+			const result = prepareItems({ items, fields, updateKey: '', useDotNotation });
+
+			expect(result).toEqual([{ user: { name: 'John' } }, { user: { name: 'Jane' } }]);
+		});
+
+		it('should parse dates', () => {
+			const items = [
+				{ json: { date: '2023-10-01T00:00:00Z' } },
+				{ json: { date: '2023-10-02T00:00:00Z' } },
+			];
+			const fields = ['date'];
+			const dateFields = ['date'];
+			const useDotNotation = false;
+			const isUpdate = false;
+			const result = prepareItems({
+				items,
+				fields,
+				updateKey: '',
+				useDotNotation,
+				dateFields,
+				isUpdate,
+			});
+			expect(result).toEqual([
+				{ date: new Date('2023-10-01T00:00:00Z') },
+				{ date: new Date('2023-10-02T00:00:00Z') },
+			]);
+		});
+
+		it('should handle updates', () => {
+			// Should keep dot notation in result to not overwrite the original values
+			const items = [
+				{ json: { id: 1, user: { name: 'John', age: 30 } } },
+				{ json: { id: 2, user: { name: 'Jane', age: 25 } } },
+			];
+			const fields = ['user.name'];
+			const useDotNotation = true;
+			const isUpdate = true;
+			const result = prepareItems({
+				items,
+				fields,
+				updateKey: '',
+				useDotNotation,
+				dateFields: [],
+				isUpdate,
+			});
+			expect(result).toEqual([{ 'user.name': 'John' }, { 'user.name': 'Jane' }]);
+		});
+	});
+});
diff --git a/packages/nodes-base/nodes/MongoDb/GenericFunctions.ts b/packages/nodes-base/nodes/MongoDb/GenericFunctions.ts
index 68edc03e1d..df5dacc19e 100644
--- a/packages/nodes-base/nodes/MongoDb/GenericFunctions.ts
+++ b/packages/nodes-base/nodes/MongoDb/GenericFunctions.ts
@@ -80,13 +80,21 @@ export function validateAndResolveMongoCredentials(
 	}
 }
 
-export function prepareItems(
-	items: INodeExecutionData[],
-	fields: string[],
+export function prepareItems({
+	items,
+	fields,
 	updateKey = '',
 	useDotNotation = false,
-	dateFields: string[] = [],
-) {
+	dateFields = [],
+	isUpdate = false,
+}: {
+	items: INodeExecutionData[];
+	fields: string[];
+	updateKey?: string;
+	useDotNotation?: boolean;
+	dateFields?: string[];
+	isUpdate?: boolean;
+}) {
 	let data = items;
 
 	if (updateKey) {
@@ -112,7 +120,7 @@ export function prepareItems(
 				fieldData = new Date(fieldData as string);
 			}
 
-			if (useDotNotation) {
+			if (useDotNotation && !isUpdate) {
 				set(updateItem, field, fieldData);
 			} else {
 				updateItem[field] = fieldData;
diff --git a/packages/nodes-base/nodes/MongoDb/MongoDb.node.ts b/packages/nodes-base/nodes/MongoDb/MongoDb.node.ts
index bc39e877da..86afe14690 100644
--- a/packages/nodes-base/nodes/MongoDb/MongoDb.node.ts
+++ b/packages/nodes-base/nodes/MongoDb/MongoDb.node.ts
@@ -36,7 +36,7 @@ export class MongoDb implements INodeType {
 		name: 'mongoDb',
 		icon: 'file:mongodb.svg',
 		group: ['input'],
-		version: [1, 1.1],
+		version: [1, 1.1, 1.2],
 		description: 'Find, insert and update documents in MongoDB',
 		defaults: {
 			name: 'MongoDB',
@@ -248,7 +248,7 @@ export class MongoDb implements INodeType {
 				? { upsert: true }
 				: undefined;
 
-			const updateItems = prepareItems(items, fields, updateKey, useDotNotation, dateFields);
+			const updateItems = prepareItems({ items, fields, updateKey, useDotNotation, dateFields });
 
 			for (const item of updateItems) {
 				try {
@@ -290,7 +290,14 @@ export class MongoDb implements INodeType {
 				? { upsert: true }
 				: undefined;
 
-			const updateItems = prepareItems(items, fields, updateKey, useDotNotation, dateFields);
+			const updateItems = prepareItems({
+				items,
+				fields,
+				updateKey,
+				useDotNotation,
+				dateFields,
+				isUpdate: nodeVersion >= 1.2,
+			});
 
 			for (const item of updateItems) {
 				try {
@@ -329,7 +336,13 @@ export class MongoDb implements INodeType {
 					this.getNodeParameter('options.dateFields', 0, '') as string,
 				);
 
-				const insertItems = prepareItems(items, fields, '', useDotNotation, dateFields);
+				const insertItems = prepareItems({
+					items,
+					fields,
+					updateKey: '',
+					useDotNotation,
+					dateFields,
+				});
 
 				const { insertedIds } = await mdb
 					.collection(this.getNodeParameter('collection', 0) as string)
@@ -370,7 +383,14 @@ export class MongoDb implements INodeType {
 				? { upsert: true }
 				: undefined;
 
-			const updateItems = prepareItems(items, fields, updateKey, useDotNotation, dateFields);
+			const updateItems = prepareItems({
+				items,
+				fields,
+				updateKey,
+				useDotNotation,
+				dateFields,
+				isUpdate: nodeVersion >= 1.2,
+			});
 
 			for (const item of updateItems) {
 				try {