diff --git a/maintenance.xml b/maintenance.xml
index 422d14b..21b5764 100644
--- a/maintenance.xml
+++ b/maintenance.xml
@@ -253,7 +253,7 @@
             <field name="report">report/calibration_total.odt</field>
             <field name="single" eval="True"/>
         </record>
-	<record model="ir.action.keyword" id="report_purchase_keyword">
+	<record model="ir.action.keyword" id="report_calibration_keyword">
             <field name="keyword">form_print</field>
             <field name="model">optical_equipment.maintenance,-1</field>
             <field name="action" ref="report_purchase"/>
diff --git a/sale.py b/sale.py
index a668a46..29d77b7 100644
--- a/sale.py
+++ b/sale.py
@@ -37,8 +37,7 @@ class Sale(metaclass=PoolMeta):
                                         'related_party': Eval('party'),
                                     },)
     agended = fields.Boolean("Scheduling",states={
-        'invisible': (Eval('sale_type') != 'maintenance'),
-        'readonly': True})
+        'invisible': (Eval('sale_type') != 'maintenance'),})
 
 
     @fields.depends('lines', 'sale_type', 'agended')