diff --git a/src/Controller/CapsuleController.php b/src/Controller/CapsuleController.php
index 26b28d309a84302b1cace4b7f25cf91fd077a332..b169c9f4fc4eaedd9d4035c34513e45f1a36d189 100644
--- a/src/Controller/CapsuleController.php
+++ b/src/Controller/CapsuleController.php
@@ -159,7 +159,7 @@ class CapsuleController extends AbstractController
 
         if (! $do_capsule_belongs_to_user) {
             $this->addFlash(
-                'capsule_deleted_error',
+                'warning',
                 $translator->trans(
                     'capsule.delete.error',
                     [
@@ -176,7 +176,7 @@ class CapsuleController extends AbstractController
             $entityManager->flush();
 
             $this->addFlash(
-                'capsule_deleted_success',
+                'success',
                 $translator->trans(
                     'capsule.delete.success',
                     [
@@ -222,9 +222,9 @@ class CapsuleController extends AbstractController
 
         if (! $capsule_repository->doCapsuleBelongsToUser($parent_capsule, $current_user)) {
             $this->addFlash(
-                'capsule_deleted_error',
+                'warning',
                 $translator->trans(
-                    'capsule.delete.error',
+                    'capsule.duplicate.error',
                     [
                         'capsule_name' => $parent_capsule->getName()
                     ]
@@ -238,7 +238,7 @@ class CapsuleController extends AbstractController
         $parent_directory_exists = $file_system->exists('../legacy/' . $parent_directory_name);
         if (! $parent_directory_exists) {
             $this->addFlash(
-                'project_does_not_exist',
+                'warning',
                 $translator->trans(
                     'project.not_exist',
                     [
diff --git a/src/Controller/ProjectController.php b/src/Controller/ProjectController.php
index e335abef682ceab323e277b15f7016f154e58e23..6fded99a76649dbe77e4ccf3e7c2883a39228478 100644
--- a/src/Controller/ProjectController.php
+++ b/src/Controller/ProjectController.php
@@ -51,7 +51,7 @@ class ProjectController extends AbstractController
         $this->createOrUpdatePasswordFile($capsule_directory, $capsule->getPassword());
 
         $this->addFlash(
-            'capsule_created_success',
+            'success',
             $translator->trans(
                 'capsule.created_success',
                 [
@@ -80,7 +80,7 @@ class ProjectController extends AbstractController
 
         if (file_exists($capsule_directory)) {
             $this->addFlash(
-                'project_already_exists',
+                'warning',
                 $translator->trans(
                     'project.already_exists',
                     [
@@ -97,7 +97,7 @@ class ProjectController extends AbstractController
         $this->createOrUpdatePasswordFile($capsule_directory, $capsule->getPassword());
 
         $this->addFlash(
-            'capsule_duplicated_success',
+            'success',
             $translator->trans(
                 'capsule.duplicate.success',
                 [
diff --git a/templates/capsule/index.html.twig b/templates/capsule/index.html.twig
index acbe4ed353d8b196181f92ed4a7e8ef984063958..c18fa5a17306da3c14718cc9a186e3e0704b011e 100644
--- a/templates/capsule/index.html.twig
+++ b/templates/capsule/index.html.twig
@@ -29,41 +29,12 @@
         </div>
     {% endfor %}
 
-    {% for flashSuccess in app.flashes('capsule_created_success') %}
+    {% for flashSuccess in app.flashes('success') %}
         <div class="text-center alert alert-success col-5 mx-auto my-5" role="alert">
             {{ flashSuccess }}
         </div>
     {% endfor %}
 
-    {% for flashSuccess in app.flashes('capsule_deleted_success') %}
-        <div class="text-center alert alert-success col-5 mx-auto my-5" role="alert">
-            {{ flashSuccess }}
-        </div>
-    {% endfor %}
-
-    {% for flashSuccess in app.flashes('capsule_deleted_error') %}
-        <div class="text-center alert alert-warning col-5 mx-auto my-5" role="alert">
-            {{ flashSuccess }}
-        </div>
-    {% endfor %}
-
-    {% for flashWarning in app.flashes('project_does_not_exist') %}
-        <div class="text-center alert alert-warning col-5 mx-auto my-5" role="alert">
-            {{ flashWarning }}
-        </div>
-    {% endfor %}
-
-    {% for flashSuccess in app.flashes('capsule_duplicated_success') %}
-        <div class="text-center alert alert-success col-5 mx-auto my-5" role="alert">
-            {{ flashSuccess }}
-        </div>
-    {% endfor %}
-
-    {% for flashSuccess in app.flashes('capsule_duplicated_error') %}
-        <div class="text-center alert alert-warning> col-5 mx-auto my-5" role="alert">
-            {{ flashSuccess }}
-        </div>
-    {% endfor %}
 </div>
 
     <div class="capsules-list d-flex flex-column m-6">
diff --git a/translations/messages.en.yaml b/translations/messages.en.yaml
index eec934e3b14ddc0d785ed7ef2dab22bcc3e84deb..b6e3029b3d13c41d03059eed90d7f7ca774c477f 100644
--- a/translations/messages.en.yaml
+++ b/translations/messages.en.yaml
@@ -75,7 +75,7 @@ capsule:
     title_name: Duplicate capsule %capsule_name%
     new_name: Enter the name of the new capsule
     success: The capsule has been successfully duplicated into capsule_name. You can see it at the end of your list
-    error: You don't have the permission to delete this capsule
+    error: You don't have the permission to duplicate this capsule
   delete:
     link: Delete capsule
     button: Delete