diff --git a/packages/@ama-sdk/schematics/schematics/typescript/core/helpers/copy-referenced-files.spec.ts b/packages/@ama-sdk/schematics/schematics/typescript/core/helpers/copy-referenced-files.spec.ts
index b9f91fe7a8..4aaf1a2bd2 100644
--- a/packages/@ama-sdk/schematics/schematics/typescript/core/helpers/copy-referenced-files.spec.ts
+++ b/packages/@ama-sdk/schematics/schematics/typescript/core/helpers/copy-referenced-files.spec.ts
@@ -2,11 +2,11 @@ import { cleanVirtualFileSystem, useVirtualFileSystem } from '@o3r/test-helpers'
 import { readFile } from 'node:fs/promises';
 import { dirname, join } from 'node:path';
 
-describe('Copy Referenced Files', () => {
+describe('Specs processing', () => {
   const virtualFileSystem = useVirtualFileSystem();
-  const copyReferencedFiles = require('./copy-referenced-files').copyReferencedFiles;
+  const {copyReferencedFiles, updateLocalRelativeRefs} = require('./copy-referenced-files');
 
-  const migrationScriptMocksPath = join(__dirname, '../../../../testing/mocks');
+  const specsMocksPath = join(__dirname, '../../../../testing/mocks');
   const specFilePath = '../models/split-spec/split-spec.yaml';
   const outputDirectory = './local-references';
 
@@ -14,7 +14,7 @@ describe('Copy Referenced Files', () => {
     if (!virtualFileSystem.existsSync(dirname(virtualPath))) {
       await virtualFileSystem.promises.mkdir(dirname(virtualPath), {recursive: true});
     }
-    await virtualFileSystem.promises.writeFile(virtualPath, await readFile(join(migrationScriptMocksPath, realPath), {encoding: 'utf8'}));
+    await virtualFileSystem.promises.writeFile(virtualPath, await readFile(join(specsMocksPath, realPath), {encoding: 'utf8'}));
   };
 
   beforeAll(async () => {
@@ -39,4 +39,15 @@ describe('Copy Referenced Files', () => {
     expect(virtualFileSystem.existsSync(join(outputDirectory, 'spec-chunk3/spec-chunk3.yaml'))).toBe(true);
     expect(virtualFileSystem.existsSync(join(outputDirectory, 'spec-chunk4/spec-chunk4.yaml'))).toBe(true);
   });
+
+  it('should update with new local basepath', async () => {
+    const specWitheRelativesFilePath = 'split-spec/split-spec.yaml';
+    const expectedSpecWitheRelativesFilePath = 'split-spec/spec-with-updated-paths.yaml';
+    const expectedContent = await readFile(join(specsMocksPath, expectedSpecWitheRelativesFilePath), {encoding: 'utf8'});
+    const specContent = await readFile(join(specsMocksPath, specWitheRelativesFilePath), {encoding: 'utf8'});
+
+    const baseRelativePath = await copyReferencedFiles(specFilePath, './output-local-directory');
+    const newSpecContent = await updateLocalRelativeRefs(specContent, baseRelativePath);
+    expect(newSpecContent).toBe(expectedContent);
+  });
 });
diff --git a/packages/@ama-sdk/schematics/schematics/typescript/core/helpers/copy-referenced-files.ts b/packages/@ama-sdk/schematics/schematics/typescript/core/helpers/copy-referenced-files.ts
index ac73243b3d..041c6771b4 100644
--- a/packages/@ama-sdk/schematics/schematics/typescript/core/helpers/copy-referenced-files.ts
+++ b/packages/@ama-sdk/schematics/schematics/typescript/core/helpers/copy-referenced-files.ts
@@ -1,6 +1,6 @@
 import { existsSync } from 'node:fs';
 import { copyFile, mkdir, readFile, rm } from 'node:fs/promises';
-import { dirname, join, normalize, posix, relative, resolve } from 'node:path';
+import { dirname, join, normalize, posix, relative, resolve, sep } from 'node:path';
 
 const refMatcher = /\B['"]?[$]ref['"]?\s*:\s*([^#\n]+)/g;
 
@@ -53,7 +53,7 @@ export function updateLocalRelativeRefs(specContent: string, newBaseRelativePath
   return specContent.replace(refMatcher, (match, ref: string) => {
     const refPath = ref.replace(/['"]/g, '');
     return refPath.startsWith('.') ?
-      match.replace(refPath, formatPath(normalize(posix.join(newBaseRelativePath, refPath))))
+      match.replace(refPath, formatPath(normalize(posix.join(newBaseRelativePath.replaceAll(sep, posix.sep), refPath))))
       : match;
   });
 }
@@ -64,12 +64,9 @@ export function updateLocalRelativeRefs(specContent: string, newBaseRelativePath
  * @param outputDirectory
  */
 export async function copyReferencedFiles(specFilePath: string, outputDirectory: string) {
-  const dedupe = (paths: string[]) =>
-    paths.filter((refPath, index) => {
-      const actualPath = join(dirname(specFilePath), refPath);
-      return paths.findIndex((otherRefPath) => join(dirname(specFilePath), otherRefPath) === actualPath) === index;
-    });
-  const refPaths = dedupe(await extractRefPathRecursive(specFilePath, specFilePath, new Set()));
+  const dedupe = (paths: string[]) => ([...new Set(paths)]);
+  const allRefPaths = await extractRefPathRecursive(specFilePath, specFilePath, new Set());
+  const refPaths = dedupe(allRefPaths);
   if (refPaths.length) {
     if (existsSync(outputDirectory)) {
       await rm(outputDirectory, { recursive: true });
diff --git a/packages/@ama-sdk/schematics/schematics/typescript/core/index.ts b/packages/@ama-sdk/schematics/schematics/typescript/core/index.ts
index da50794267..75b4c64604 100644
--- a/packages/@ama-sdk/schematics/schematics/typescript/core/index.ts
+++ b/packages/@ama-sdk/schematics/schematics/typescript/core/index.ts
@@ -162,6 +162,7 @@ function ngGenerateTypescriptSDKFn(options: NgGenerateTypescriptSDKCoreSchematic
 
       if (path.relative(process.cwd(), specPath).startsWith('..')) {
         // TODO would be better to create files on tree instead of FS
+        // https://github.com/AmadeusITGroup/otter/issues/2078
         const newRelativePath = await copyReferencedFiles(specPath, './spec-local-references');
         if (newRelativePath) {
           specContent = updateLocalRelativeRefs(specContent, newRelativePath);
diff --git a/packages/@ama-sdk/schematics/testing/mocks/split-spec/spec-chunk1.yaml b/packages/@ama-sdk/schematics/testing/mocks/split-spec/spec-chunk1.yaml
index 7273682c85..f05a4a1d9c 100644
--- a/packages/@ama-sdk/schematics/testing/mocks/split-spec/spec-chunk1.yaml
+++ b/packages/@ama-sdk/schematics/testing/mocks/split-spec/spec-chunk1.yaml
@@ -7,3 +7,5 @@ properties:
     example: 10
   category:
     $ref: './split-spec.yaml#/components/schemas/Category'
+  category2:
+      $ref: '../spec-chunk4/spec-chunk4.yaml#/components/schemas/Category'
diff --git a/packages/@ama-sdk/schematics/testing/mocks/split-spec/spec-with-updated-paths.yaml b/packages/@ama-sdk/schematics/testing/mocks/split-spec/spec-with-updated-paths.yaml
new file mode 100644
index 0000000000..4f5fc58aed
--- /dev/null
+++ b/packages/@ama-sdk/schematics/testing/mocks/split-spec/spec-with-updated-paths.yaml
@@ -0,0 +1,45 @@
+openapi: 3.0.2
+info:
+  description: test
+  title: test
+  version: 0.0.0
+paths:
+  /test:
+    get:
+      responses:
+        '200':
+          description: test
+          content:
+            application/json:
+              schema:
+                $ref: './output-local-directory/split-spec/spec-chunk1.yaml'
+  /test2:
+    get:
+      responses:
+        '200':
+          description: test
+          content:
+            application/json:
+              schema:
+                $ref: './output-local-directory/spec-chunk2.yaml'
+  /test3:
+    get:
+      responses:
+        '200':
+          description: test
+          content:
+            application/json:
+              schema:
+                $ref: './output-local-directory/spec-chunk3/spec-chunk3.yaml'
+components:
+  schemas:
+    Category:
+      type: object
+      properties:
+        id:
+          type: integer
+          format: int64
+          example: 10
+        name:
+          type: string
+          example: "test"