diff --git a/src/Resources/config/doctrine/model/Promotion.orm.xml b/src/Resources/config/doctrine/model/Promotion.orm.xml
index bc29e7d..9647f7e 100644
--- a/src/Resources/config/doctrine/model/Promotion.orm.xml
+++ b/src/Resources/config/doctrine/model/Promotion.orm.xml
@@ -11,11 +11,6 @@
             <generator strategy="AUTO"/>
         </id>
 
-        <indexes>
-            <index columns="created_at"/>
-            <index columns="updated_at"/>
-        </indexes>
-
         <field name="code" type="string" unique="true"/>
         <field name="name" type="string"/>
         <field name="description" type="string" nullable="true"/>
@@ -27,11 +22,7 @@
         <field name="startsAt" column="starts_at" type="datetime" nullable="true"/>
         <field name="endsAt" column="ends_at" type="datetime" nullable="true"/>
         <field name="enabled" type="boolean"/>
-        <field name="discount" column="discount" type="decimal" precision="10" scale="5">
-            <options>
-                <option name="default">0</option>
-            </options>
-        </field>
+        <field name="discount" column="discount" type="decimal" precision="10" scale="5"/>
         <field name="createdAt" column="created_at" type="datetime">
             <gedmo:timestampable on="create"/>
         </field>