diff --git a/addons/account/models/account_bank_statement.py b/addons/account/models/account_bank_statement.py
index d315a12e6e9..4c93cb35b94 100644
--- a/addons/account/models/account_bank_statement.py
+++ b/addons/account/models/account_bank_statement.py
@@ -345,10 +345,8 @@ class AccountBankStatement(models.Model):
     def link_bank_to_partner(self):
         for statement in self:
             for st_line in statement.line_ids:
-                if st_line.bank_account_id and st_line.partner_id and st_line.bank_account_id.partner_id.id != st_line.partner_id.id:
-                    bank_vals = st_line.bank_account_id.onchange_partner_id(st_line.partner_id.id)['value']
-                    bank_vals.update({'partner_id': st_line.partner_id.id})
-                    st_line.bank_account_id.write(bank_vals)
+                if st_line.bank_account_id and st_line.partner_id and st_line.bank_account_id.partner_id != st_line.partner_id:
+                    st_line.bank_account_id.partner_id = st_line.partner_id
 
 
 class AccountBankStatementLine(models.Model):