diff --git a/addons/mail/static/src/components/message/message.xml b/addons/mail/static/src/components/message/message.xml
index 02a0c49e20c..d248c422550 100644
--- a/addons/mail/static/src/components/message/message.xml
+++ b/addons/mail/static/src/components/message/message.xml
@@ -156,7 +156,7 @@
                     </t>
                     <div class="o_Message_content" t-ref="content">
                         <t t-raw="message.prettyBody"/>
-                        <t t-if="message.subtype_description">
+                        <t t-if="message.subtype_description and !message.isBodyEqualSubtypeDescription">
                             <p t-esc="message.subtype_description"/>
                         </t>
                         <t t-if="trackingValues.length > 0">
diff --git a/addons/mail/static/src/components/message/message_tests.js b/addons/mail/static/src/components/message/message_tests.js
index 8e2669a8698..7f10771ce0d 100644
--- a/addons/mail/static/src/components/message/message_tests.js
+++ b/addons/mail/static/src/components/message/message_tests.js
@@ -108,7 +108,8 @@ QUnit.test('basic rendering', async function (assert) {
         1,
         "message should display the content"
     );
-    assert.strictEqual(messageEl.querySelector(`:scope .o_Message_content`).innerHTML,
+    assert.strictEqual(
+        messageEl.querySelector(`:scope .o_Message_content`).innerHTML,
         "<p>Test</p>",
         "message should display the correct content"
     );
@@ -738,6 +739,50 @@ QUnit.test('prevent attachment delete on non-authored message', async function (
     );
 });
 
+QUnit.test('subtype description should be displayed if it is different than body', async function (assert) {
+    assert.expect(2);
+
+    await this.start();
+    const message = this.env.models['mail.message'].create({
+        body: "<p>Hello</p>",
+        id: 100,
+        subtype_description: 'Bonjour',
+    });
+    await this.createMessageComponent(message);
+    assert.containsOnce(
+        document.body,
+        '.o_Message_content',
+        "message should have content"
+    );
+    assert.strictEqual(
+        document.querySelector(`.o_Message_content`).textContent,
+        "HelloBonjour",
+        "message content should display both body and subtype description when they are different"
+    );
+});
+
+QUnit.test('subtype description should not be displayed if it is similar to body', async function (assert) {
+    assert.expect(2);
+
+    await this.start();
+    const message = this.env.models['mail.message'].create({
+        body: "<p>Hello</p>",
+        id: 100,
+        subtype_description: 'hello',
+    });
+    await this.createMessageComponent(message);
+    assert.containsOnce(
+        document.body,
+        '.o_Message_content',
+        "message should have content"
+    );
+    assert.strictEqual(
+        document.querySelector(`.o_Message_content`).textContent,
+        "Hello",
+        "message content should display only body when subtype description is similar"
+    );
+});
+
 });
 });
 });
diff --git a/addons/mail/static/src/models/message/message.js b/addons/mail/static/src/models/message/message.js
index e982df36667..c92714fb3e8 100644
--- a/addons/mail/static/src/models/message/message.js
+++ b/addons/mail/static/src/models/message/message.js
@@ -4,7 +4,7 @@ odoo.define('mail/static/src/models/message/message.js', function (require) {
 const emojis = require('mail.emojis');
 const { registerNewModel } = require('mail/static/src/model/model_core.js');
 const { attr, many2many, many2one, one2many } = require('mail/static/src/model/model_field.js');
-const { addLink, parseAndTransform } = require('mail.utils');
+const { addLink, htmlToTextContentInline, parseAndTransform } = require('mail.utils');
 
 const { str_to_datetime } = require('web.time');
 
@@ -349,6 +349,18 @@ function factory(dependencies) {
             );
         }
 
+        /**
+         * @private
+         * @returns {boolean}
+         */
+        _computeIsBodyEqualSubtypeDescription() {
+            if (!this.body || !this.subtype_description) {
+                return false;
+            }
+            const inlineBody = htmlToTextContentInline(this.body);
+            return inlineBody.toLowerCase() === this.subtype_description.toLowerCase();
+        }
+
         /**
          * @private
          * @returns {boolean}
@@ -480,6 +492,34 @@ function factory(dependencies) {
                 'messagingCurrentPartner',
             ],
         }),
+        /**
+         * States whether `body` and `subtype_description` contain similar
+         * values.
+         *
+         * This is necessary to avoid displaying both of them together when they
+         * contain duplicate information. This will especially happen with
+         * messages that are posted automatically at the creation of a record
+         * (messages that serve as tracking messages). They do have hard-coded
+         * "record created" body while being assigned a subtype with a
+         * description that states the same information.
+         *
+         * Fixing newer messages is possible by not assigning them a duplicate
+         * body content, but the check here is still necessary to handle
+         * existing messages.
+         *
+         * Limitations:
+         * - A translated subtype description might not match a non-translatable
+         *   body created by a user with a different language.
+         * - Their content might be mostly but not exactly the same.
+         */
+        isBodyEqualSubtypeDescription: attr({
+            compute: '_computeIsBodyEqualSubtypeDescription',
+            default: false,
+            dependencies: [
+                'body',
+                'subtype_description',
+            ],
+        }),
         isModeratedByCurrentPartner: attr({
             compute: '_computeIsModeratedByCurrentPartner',
             default: false,