diff --git a/models/account_payment.py b/models/account_payment.py
index 14c1579..f8d676f 100644
--- a/models/account_payment.py
+++ b/models/account_payment.py
@@ -1,4 +1,4 @@
-from odoo import fields, models, _
+from odoo import fields, models, api, _
 from odoo.exceptions import UserError
 
 class AccountPayment(models.Model):
@@ -8,53 +8,65 @@ class AccountPayment(models.Model):
 
     def action_post(self):
         """
-        Force synchronization before posting to ensure deductions are included.
-        We use the 'skip_expense_lock' context to bypass hr_expense's strict validation.
+        Overriding to bypass hr_expense restriction and ensure deductions are synced.
         """
-        return super(AccountPayment, self.with_context(skip_expense_lock=True)).action_post()
+        # Identify payments that would normally be locked by hr_expense
+        locked_payouts = self.filtered(lambda p: p.expense_sheet_id)
+        if locked_payouts:
+            # Store links to restore later
+            links = {p.id: p.expense_sheet_id.id for p in locked_payouts}
+            
+            # 1. Hide the links in the cache so hr_expense's _synchronize_to_moves doesn't see them
+            for p in locked_payouts:
+                p.env.cache.set(p, p._fields['expense_sheet_id'], False)
+            
+            try:
+                # 2. Force a sync with the 'amount' field to ensure deductions are redrawn
+                for p in locked_payouts:
+                    if p.state == 'draft':
+                        p._synchronize_to_moves({'amount', 'deduction_line_ids', 'amount_substract'})
+                
+                # 3. Call the standard post logic while the link is hidden
+                res = super().action_post()
+                return res
+            finally:
+                # 4. Restore the links
+                for p in locked_payouts:
+                    if p.id in links:
+                        p.env.cache.set(p, p._fields['expense_sheet_id'], self.env['hr.expense.sheet'].browse(links[p.id]))
+        else:
+            return super().action_post()
 
     def _synchronize_to_moves(self, changed_fields):
-        # Trigger deduction sync if needed
+        # If deductions changed, we MUST include 'amount' to trigger Odoo's refresh
         if 'deduction_line_ids' in changed_fields or 'amount_substract' in changed_fields:
-            if 'amount' not in changed_fields:
-                changed_fields = set(changed_fields) | {'amount'}
+             changed_fields = set(changed_fields) | {'amount'}
 
-        if self._context.get('skip_expense_lock'):
-            # Safely call super() - the hr_expense override also checks context (via our own override below)
-            return super()._synchronize_to_moves(changed_fields)
-
-        # For manual edits, standard hr_expense error will apply via the super() chain
+        # Case for manual edits (write) when payment is draft
+        draft_locked = self.filtered(lambda p: p.state == 'draft' and p.expense_sheet_id)
+        if draft_locked:
+            links = {p.id: p.expense_sheet_id.id for p in draft_locked}
+            for p in draft_locked:
+                p.env.cache.set(p, p._fields['expense_sheet_id'], False)
+            try:
+                return super()._synchronize_to_moves(changed_fields)
+            finally:
+                for p in draft_locked:
+                    if p.id in links:
+                        p.env.cache.set(p, p._fields['expense_sheet_id'], self.env['hr.expense.sheet'].browse(links[p.id]))
+        
         return super()._synchronize_to_moves(changed_fields)
 
-    def _synchronize_from_moves(self, changed_fields):
-        if self._context.get('skip_expense_lock'):
-            return super()._synchronize_from_moves(changed_fields)
-        return super()._synchronize_from_moves(changed_fields)
-
     def write(self, vals):
-        if 'deduction_line_ids' in vals or 'amount_substract' in vals:
-            # Force trigger sync with bypass flag
-            return super(AccountPayment, self.with_context(skip_expense_lock=True)).write(vals)
+        # Standard Odoo write: if we are editing deductions, ensure bypass is used if needed
+        # (Though _synchronize_to_moves override above should handle it)
         return super().write(vals)
 
-    def write(self, vals):
-        """
-        Override write to manually trigger synchronization when deductions change.
-        We include 'amount' in the changed_fields to trick Odoo's core sync engine
-        into refreshing the move lines, which will then include the deductions.
-        """
-        res = super().write(vals)
-        if 'deduction_line_ids' in vals or 'amount_substract' in vals:
-            # Force trigger sync by pretending amount changed if deductions changed
-            self._synchronize_to_moves({'amount', 'deduction_line_ids', 'amount_substract'})
-        return res
-
     def action_cancel(self):
         res = super().action_cancel()
         for payment in self:
             if payment.expense_sheet_id:
                 payment.expense_sheet_id.invalidate_recordset(['state'])
-            # Also check if it's linked via realization
             if payment.realization_id and payment.realization_id.expense_sheet_id:
                 payment.realization_id.expense_sheet_id.invalidate_recordset(['state'])
         return res