diff --git a/addons/account/models/account_bank_statement.py b/addons/account/models/account_bank_statement.py
index 46db7c5c8e7..014a16b0115 100644
--- a/addons/account/models/account_bank_statement.py
+++ b/addons/account/models/account_bank_statement.py
@@ -657,7 +657,13 @@ class AccountBankStatementLine(models.Model):
 
         #create the res.partner.bank if needed
         if self.account_number and self.partner_id and not self.bank_account_id:
-            self.bank_account_id = self.env['res.partner.bank'].create({'acc_number': self.account_number, 'partner_id': self.partner_id.id}).id
+            bank_account = self.env['res.partner.bank'].search(
+                [('acc_number', '=', self.account_number), ('partner_id', '=', self.partner_id.id)])
+            if not bank_account:
+                bank_account = self.env['res.partner.bank'].create({
+                    'acc_number': self.account_number, 'partner_id': self.partner_id.id
+                })
+            self.bank_account_id = bank_account
 
         counterpart_moves.assert_balanced()
         return counterpart_moves