diff --git a/lib/Alchemy/Phrasea/Core/Version.php b/lib/Alchemy/Phrasea/Core/Version.php
index b2bf620798..0e15108724 100644
--- a/lib/Alchemy/Phrasea/Core/Version.php
+++ b/lib/Alchemy/Phrasea/Core/Version.php
@@ -16,7 +16,7 @@ class Version
     /**
      * @var string
      */
-    private $number = '4.1.0-alpha.14a';
+    private $number = '4.1.0-alpha.15a';
 
     /**
      * @var string
diff --git a/lib/conf.d/bases_structure.xml b/lib/conf.d/bases_structure.xml
index a4d0d2f9c5..a666eaeb5c 100644
--- a/lib/conf.d/bases_structure.xml
+++ b/lib/conf.d/bases_structure.xml
@@ -1278,6 +1278,27 @@
               <field>id</field>
             </fields>
           </index>
+          <index>
+            <name>usr_id</name>
+            <type>INDEX</type>
+            <fields>
+              <field>usr_id</field>
+            </fields>
+          </index>
+          <index>
+            <name>unread</name>
+            <type>INDEX</type>
+            <fields>
+              <field>unread</field>
+            </fields>
+          </index>
+          <index>
+            <name>created_on</name>
+            <type>INDEX</type>
+            <fields>
+              <field>created_on</field>
+            </fields>
+          </index>
         </indexes>
         <engine>InnoDB</engine>
       </table>