diff --git a/addons/account/views/account_move_views.xml b/addons/account/views/account_move_views.xml
index 2340892218c..6b3b9768a01 100644
--- a/addons/account/views/account_move_views.xml
+++ b/addons/account/views/account_move_views.xml
@@ -189,6 +189,7 @@
                     <field name="amount_residual" sum="Total Residual" string="Residual" optional="hide" attrs="{'invisible':[('is_account_reconcile', '=', False)]}"/>
                     <field name="amount_residual_currency" sum="Total Residual in Currency" string="Residual in Currency" optional="hide" attrs="{'invisible':['|', ('is_same_currency', '=', True), ('is_account_reconcile', '=', False)]}"/>
 
+                    <field name="move_id" invisible="1"/>
                     <field name="parent_state" invisible="1"/>
                     <field name="account_type" invisible="1"/>
                     <field name="statement_id" invisible="1"/>
diff --git a/addons/mail/static/src/models/thread.js b/addons/mail/static/src/models/thread.js
index 99fa52d3b0c..bb7a76c3748 100644
--- a/addons/mail/static/src/models/thread.js
+++ b/addons/mail/static/src/models/thread.js
@@ -949,10 +949,6 @@ registerModel({
          */
         async setMainAttachment(attachment) {
             this.update({ mainAttachment: attachment });
-            if (this.model === 'account.move.line') {
-                // account.move.line is not actually a thread in python
-                return;
-            }
             await this.messaging.rpc({
                 model: 'ir.attachment',
                 method: 'register_as_main_attachment',
diff --git a/addons/mail/static/src/models/web_client_view_attachment_view.js b/addons/mail/static/src/models/web_client_view_attachment_view.js
index 0c6db5f6aa9..41deb1f9b2a 100644
--- a/addons/mail/static/src/models/web_client_view_attachment_view.js
+++ b/addons/mail/static/src/models/web_client_view_attachment_view.js
@@ -37,11 +37,6 @@ registerModel({
          * @private
          */
         _onChangeThreadAttachmentsInWebClientView() {
-            if (this.thread.model === 'account.move.line') {
-                // account.move.line is not actually a thread in python
-                this.setMainAttachmentFromIndex(0);
-                return;
-            }
             if (
                 this.thread.areAttachmentsLoaded &&
                 !this.thread.isLoadingAttachments &&