diff --git a/packages/cli/src/modules/data-table/__tests__/data-table.controller.integration.test.ts b/packages/cli/src/modules/data-table/__tests__/data-table.controller.integration.test.ts
index c14ed0897ec..339bcb07481 100644
--- a/packages/cli/src/modules/data-table/__tests__/data-table.controller.integration.test.ts
+++ b/packages/cli/src/modules/data-table/__tests__/data-table.controller.integration.test.ts
@@ -100,6 +100,24 @@ describe('POST /projects/:projectId/data-tables', () => {
 		await authOwnerAgent.post(`/projects/${project.id}/data-tables`).send(payload).expect(400);
 	});
 
+	test('should return 409 when column name conflicts with system columns', async () => {
+		const project = await createTeamProject(undefined, owner);
+
+		for (const systemColumnName of ['id', 'ID', 'createdAt', 'updatedAt']) {
+			const payload = {
+				name: `Table with ${systemColumnName}`,
+				columns: [{ name: systemColumnName, type: 'string' }],
+			};
+
+			const response = await authOwnerAgent
+				.post(`/projects/${project.id}/data-tables`)
+				.send(payload)
+				.expect(409);
+
+			expect(response.body.message).toContain('reserved');
+		}
+	});
+
 	test('should not create data table if user has project:viewer role in team project', async () => {
 		const project = await createTeamProject(undefined, owner);
 		await linkUserToProject(member, project, 'project:viewer');
diff --git a/packages/cli/src/modules/data-table/__tests__/data-table.service.integration.test.ts b/packages/cli/src/modules/data-table/__tests__/data-table.service.integration.test.ts
index 770516e1ba1..c9677ade2bc 100644
--- a/packages/cli/src/modules/data-table/__tests__/data-table.service.integration.test.ts
+++ b/packages/cli/src/modules/data-table/__tests__/data-table.service.integration.test.ts
@@ -10,6 +10,7 @@ import { DataTableRepository } from '../data-table.repository';
 import { DataTableService } from '../data-table.service';
 import { mockDataTableSizeValidator } from './test-helpers';
 import { DataTableColumnNameConflictError } from '../errors/data-table-column-name-conflict.error';
+import { DataTableSystemColumnNameConflictError } from '../errors/data-table-system-column-name-conflict.error';
 import { DataTableColumnNotFoundError } from '../errors/data-table-column-not-found.error';
 import { DataTableNameConflictError } from '../errors/data-table-name-conflict.error';
 import { DataTableNotFoundError } from '../errors/data-table-not-found.error';
@@ -140,6 +141,25 @@ describe('dataTable', () => {
 			expect(project.name).toBe(project1.name);
 		});
 
+		it('should reject columns named after system columns (id, createdAt, updatedAt)', async () => {
+			for (const systemColumnName of [
+				'id',
+				'ID',
+				'Id',
+				'createdAt',
+				'CreatedAt',
+				'updatedAt',
+				'UpdatedAt',
+			]) {
+				await expect(
+					dataTableService.createDataTable(project1.id, {
+						name: `table_with_${systemColumnName}`,
+						columns: [{ name: systemColumnName, type: 'string' }],
+					}),
+				).rejects.toThrow(DataTableSystemColumnNameConflictError);
+			}
+		});
+
 		it('should return an error if name/project combination already exists', async () => {
 			const name = 'dataTable';
 
diff --git a/packages/cli/src/modules/data-table/data-table-column.repository.ts b/packages/cli/src/modules/data-table/data-table-column.repository.ts
index 7f229e467d6..3ae66283f13 100644
--- a/packages/cli/src/modules/data-table/data-table-column.repository.ts
+++ b/packages/cli/src/modules/data-table/data-table-column.repository.ts
@@ -29,10 +29,11 @@ export class DataTableColumnRepository extends Repository<DataTableColumn> {
 	 * Validates that a column name is not reserved as a system column
 	 */
 	private validateNotSystemColumn(columnName: string): void {
-		if (DATA_TABLE_SYSTEM_COLUMNS.includes(columnName)) {
+		const lowerName = columnName.toLowerCase();
+		if (DATA_TABLE_SYSTEM_COLUMNS.some((sc) => sc.toLowerCase() === lowerName)) {
 			throw new DataTableSystemColumnNameConflictError(columnName);
 		}
-		if (columnName === DATA_TABLE_SYSTEM_TESTING_COLUMN) {
+		if (lowerName === DATA_TABLE_SYSTEM_TESTING_COLUMN.toLowerCase()) {
 			throw new DataTableSystemColumnNameConflictError(columnName, 'testing');
 		}
 	}
diff --git a/packages/cli/src/modules/data-table/data-table.controller.ts b/packages/cli/src/modules/data-table/data-table.controller.ts
index f94361a267f..bc77ab8a8cf 100644
--- a/packages/cli/src/modules/data-table/data-table.controller.ts
+++ b/packages/cli/src/modules/data-table/data-table.controller.ts
@@ -112,7 +112,10 @@ export class DataTableController {
 		} catch (e: unknown) {
 			if (!(e instanceof Error)) {
 				throw e;
-			} else if (e instanceof DataTableNameConflictError) {
+			} else if (
+				e instanceof DataTableNameConflictError ||
+				e instanceof DataTableSystemColumnNameConflictError
+			) {
 				throw new ConflictError(e.message);
 			} else if (e instanceof DataTableValidationError) {
 				throw new BadRequestError(e.message);
diff --git a/packages/cli/src/modules/data-table/data-table.repository.ts b/packages/cli/src/modules/data-table/data-table.repository.ts
index 0e6bbb9379c..a9e803168ec 100644
--- a/packages/cli/src/modules/data-table/data-table.repository.ts
+++ b/packages/cli/src/modules/data-table/data-table.repository.ts
@@ -8,7 +8,11 @@ import { GlobalConfig } from '@n8n/config';
 import { Project, withTransaction } from '@n8n/db';
 import { Service } from '@n8n/di';
 import { DataSource, EntityManager, Repository, SelectQueryBuilder } from '@n8n/typeorm';
-import { UnexpectedError } from 'n8n-workflow';
+import {
+	DATA_TABLE_SYSTEM_COLUMNS,
+	DATA_TABLE_SYSTEM_TESTING_COLUMN,
+	UnexpectedError,
+} from 'n8n-workflow';
 import type { DataTableInfo, DataTablesSizeData } from 'n8n-workflow';
 
 import { DataTableColumn } from './data-table-column.entity';
@@ -16,6 +20,7 @@ import { DataTableDDLService } from './data-table-ddl.service';
 import { DataTable } from './data-table.entity';
 import { DataTableUserTableName } from './data-table.types';
 import { DataTableNameConflictError } from './errors/data-table-name-conflict.error';
+import { DataTableSystemColumnNameConflictError } from './errors/data-table-system-column-name-conflict.error';
 import { DataTableValidationError } from './errors/data-table-validation.error';
 import { isValidColumnName, toTableId, toTableName } from './utils/sql-utils';
 
@@ -56,6 +61,16 @@ export class DataTableRepository extends Repository<DataTable> {
 				throw new DataTableValidationError(DATA_TABLE_COLUMN_ERROR_MESSAGE);
 			}
 
+			for (const col of columns) {
+				const lowerName = col.name.toLowerCase();
+				if (DATA_TABLE_SYSTEM_COLUMNS.some((sc) => sc.toLowerCase() === lowerName)) {
+					throw new DataTableSystemColumnNameConflictError(col.name);
+				}
+				if (lowerName === DATA_TABLE_SYSTEM_TESTING_COLUMN.toLowerCase()) {
+					throw new DataTableSystemColumnNameConflictError(col.name, 'testing');
+				}
+			}
+
 			const dataTable = em.create(DataTable, { name, columns, projectId });
 
 			await em.insert(DataTable, dataTable);
diff --git a/packages/frontend/editor-ui/src/features/core/dataTable/components/AddDataTableModal.vue b/packages/frontend/editor-ui/src/features/core/dataTable/components/AddDataTableModal.vue
index 52908e99a6e..5302b433912 100644
--- a/packages/frontend/editor-ui/src/features/core/dataTable/components/AddDataTableModal.vue
+++ b/packages/frontend/editor-ui/src/features/core/dataTable/components/AddDataTableModal.vue
@@ -86,7 +86,7 @@ const getColumnTypeOptions = (compatibleTypes: ColumnType[]) => {
 };
 
 const validateColumnName = (columnName: string): string | undefined => {
-	if (DATA_TABLE_SYSTEM_COLUMNS.includes(columnName)) {
+	if (DATA_TABLE_SYSTEM_COLUMNS.some((sc) => sc.toLowerCase() === columnName.toLowerCase())) {
 		return i18n.baseText('dataTable.import.systemColumnName', {
 			interpolate: { columnName },
 		});