diff --git a/odex25_purchase/purchase_requisition_custom/models/purchase_order.py b/odex25_purchase/purchase_requisition_custom/models/purchase_order.py
index 18c84c442..ec359a77a 100644
--- a/odex25_purchase/purchase_requisition_custom/models/purchase_order.py
+++ b/odex25_purchase/purchase_requisition_custom/models/purchase_order.py
@@ -495,6 +495,8 @@ class PurchaseOrderCustom(models.Model):
 
             order.budget_amount = 0
         super(PurchaseOrderCustom, self).button_cancel()
+    def action_to_approve(self):
+        self.write({'state': 'to approve'})
 
     def action_sign_purchase_orders(self):
         for rec in self:
diff --git a/odex25_purchase/purchase_requisition_custom/models/purchase_requisition_custom.py b/odex25_purchase/purchase_requisition_custom/models/purchase_requisition_custom.py
index 20fb30bd5..233370c1a 100644
--- a/odex25_purchase/purchase_requisition_custom/models/purchase_requisition_custom.py
+++ b/odex25_purchase/purchase_requisition_custom/models/purchase_requisition_custom.py
@@ -629,17 +629,22 @@ class CommitteeTypes(models.Model):
     @api.model
     def create(self, vals):
         res = super(CommitteeTypes, self).create(vals)
-        if res.committe_head.id not in res.committe_members.ids:
+        if res.committe_head and res.committe_head.id not in res.committe_members.ids:
             res.committe_members = [(4, res.committe_head.id)]
         return res
 
     def write(self, vals):
-        current_head = self.committe_head.id
-        if 'committe_head' in vals and current_head in self.committe_members.ids:
-            vals['committe_members'] = [(3, current_head), (4, vals['committe_head'])]
+        for record in self:
+            old_head_id = record.committe_head.id if record.committe_head else False
+            new_head_id = vals.get('committe_head')
+
+            if new_head_id:
+                if old_head_id and old_head_id in record.committe_members.ids:
+                    record.committe_members = [(3, old_head_id)]
+                if new_head_id not in record.committe_members.ids:
+                    record.committe_members = [(4, new_head_id)]
+
         return super(CommitteeTypes, self).write(vals)
-
-
 class CommitteMembers(models.Model):
     _name = "committe.member"
     _description = "committe.member"
diff --git a/odex25_purchase/purchase_requisition_custom/views/purchase_requisition_custom.xml b/odex25_purchase/purchase_requisition_custom/views/purchase_requisition_custom.xml
index 671b5e118..af79d7615 100644
--- a/odex25_purchase/purchase_requisition_custom/views/purchase_requisition_custom.xml
+++ b/odex25_purchase/purchase_requisition_custom/views/purchase_requisition_custom.xml
@@ -157,6 +157,7 @@
                     <field name="hide_action_budget_button" invisible="1"/>
                     <field name="requisition_state" invisible="1"/>
                     <field name="requisition_type_exclusive" invisible="1"/>
+                       <button type="object" name="action_to_approve" class="oe_highlight" states="to approve" string="Approve"/>
                     <button type="object" name="action_sign" class="oe_highlight"
                             groups="purchase_requisition_custom.group_sign_purchase_order"
                             attrs="{'invisible':['|',('requisition_id','=',False),