diff --git a/attachment_preview/readme/CONTRIBUTORS.rst b/attachment_preview/readme/CONTRIBUTORS.rst
index da0e7b99f01..3b75ccdb319 100644
--- a/attachment_preview/readme/CONTRIBUTORS.rst
+++ b/attachment_preview/readme/CONTRIBUTORS.rst
@@ -1,2 +1,3 @@
 * Holger Brunn <mail@hunki-enterprises.com>
 * Dennis Sluijk <d.sluijk@onestein.nl>
+* Sebastiano Picchi <sebastiano.picchi@pytech.it>
diff --git a/attachment_preview/static/src/js/attachment_preview.js b/attachment_preview/static/src/js/attachment_preview.js
index fa0284c7e66..9757092fe6b 100644
--- a/attachment_preview/static/src/js/attachment_preview.js
+++ b/attachment_preview/static/src/js/attachment_preview.js
@@ -334,7 +334,9 @@ odoo.define("/attachment_preview/static/src/js/attachment_preview.js", function
 
                 attachments = _.object(
                     attachments.map((att) => {
-                        return parseInt(att.localId.slice(16), 10);
+                        const tmp_id = parseInt(att.localId.slice(16), 10);
+                        if (tmp_id > 0) return tmp_id;
+                        return null;
                     }),
                     attachments.map((at) => {
                         if (at.defaultSource) {