diff --git a/NG-RO/osm_ng_ro/ns.py b/NG-RO/osm_ng_ro/ns.py
index 7de864e..6cea780 100644
--- a/NG-RO/osm_ng_ro/ns.py
+++ b/NG-RO/osm_ng_ro/ns.py
@@ -999,6 +999,7 @@
                             disk_list.append(persistent_root_disk[vsd["id"]])
 
                             return persistent_root_disk
+                return persistent_root_disk
 
     @staticmethod
     def find_persistent_volumes(
diff --git a/NG-RO/osm_ng_ro/tests/test_ns.py b/NG-RO/osm_ng_ro/tests/test_ns.py
index fcfe897..27c21a6 100644
--- a/NG-RO/osm_ng_ro/tests/test_ns.py
+++ b/NG-RO/osm_ng_ro/tests/test_ns.py
@@ -3368,7 +3368,7 @@
         persist_root_disk = self.ns.find_persistent_root_volumes(
             vnfd, target_vdu, vdu_instantiation_volumes_list, disk_list
         )
-        self.assertEqual(persist_root_disk, None)
+        self.assertEqual(persist_root_disk, {})
         mock_volume_keeping_required.assert_not_called()
         self.assertEqual(disk_list, [])
 
diff --git a/releasenotes/notes/fix_bug_2282-a4069468a849963e.yaml b/releasenotes/notes/fix_bug_2282-a4069468a849963e.yaml
new file mode 100644
index 0000000..72386f2
--- /dev/null
+++ b/releasenotes/notes/fix_bug_2282-a4069468a849963e.yaml
@@ -0,0 +1,23 @@
+#######################################################################################
+# Copyright ETSI Contributors and Others.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+# implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#######################################################################################
+---
+fixes:
+  - |
+    Fix Bug 2282
+
+    Add the posibility to return an empty dictionary to `find_persistent_root_volumes()` method
+    so the NS instantiation doesn't fail while using a pre existing volume.