diff --git a/quality_control_oca/models/quality_control.py b/quality_control_oca/models/quality_control.py
index e1996b5bd..fb003b9ba 100644
--- a/quality_control_oca/models/quality_control.py
+++ b/quality_control_oca/models/quality_control.py
@@ -130,11 +130,6 @@ class QcProof(orm.Model):
         'active': True,
     }
 
-    _sql_constraints = [
-        ('proof_method_unique', 'UNIQUE (proof_id, method_id)',
-         _('Proof-Method relation alredy exists!')),
-    ]
-
     def name_search(self, cr, uid, name='', args=None, operator='ilike',
                     context=None, limit=None):
         result = super(QcProof, self).name_search(cr, uid, name=name,
diff --git a/quality_control_oca/views/quality_control_view.xml b/quality_control_oca/views/quality_control_view.xml
index e3b066d9e..a09275c3d 100644
--- a/quality_control_oca/views/quality_control_view.xml
+++ b/quality_control_oca/views/quality_control_view.xml
@@ -323,7 +323,7 @@
             <field name="model">qc.test.template.line</field>
             <field name="type">tree</field>
             <field name="arch" type="xml">
-                <tree string="Test Template Line">
+                <tree string="Test Template Line" editable="bottom">
                     <field name="test_template_id" select="1" />
                     <field name="proof_id" select="1" />
                     <field name="method_id" select="1" />
@@ -525,7 +525,7 @@
                     <field name="actual_value_ql"
                         attrs="{'readonly':[('proof_type','=','quantitative')]}"
                         on_change="onchange_actual_value_ql(actual_value_ql, valid_value_ids)" />
-                    <field name="valid_value_ids" readonly="1" />
+                    <field name="valid_value_ids" readonly="1" invisible="1" />
                     <field name="actual_value_qt"
                         attrs="{'readonly':[('proof_type','=','qualitative')]}"
                         on_change="onchange_actual_value_qt(uom_id, test_uom_id, actual_value_qt, min_value, max_value)" />