diff --git a/account_usability/account_statement_black_cancel_blue_ok.diff b/account_usability/account_statement_black_cancel_blue_ok.diff
new file mode 100644
index 0000000..5ebc1bf
--- /dev/null
+++ b/account_usability/account_statement_black_cancel_blue_ok.diff
@@ -0,0 +1,14 @@
+diff --git a/addons/account/models/account_bank_statement.py b/addons/account/models/account_bank_statement.py
+index 4374528..aea1361 100644
+--- a/addons/account/models/account_bank_statement.py
++++ b/addons/account/models/account_bank_statement.py
+@@ -1008,7 +1008,7 @@ class AccountBankStatementLine(models.Model):
+             #record the move name on the statement line to be able to retrieve it in case of unreconciliation
+             self.write({'move_name': move.name})
+             payment.write({'payment_reference': move.name})
+-        elif self.move_name:
+-            raise UserError(_('Operation not allowed. Since your statement line already received a number, you cannot reconcile it entirely with existing journal entries otherwise it would make a gap in the numbering. You should book an entry and make a regular revert of it in case you want to cancel it.'))
++        #elif self.move_name:
++        #    raise UserError(_('Operation not allowed. Since your statement line already received a number, you cannot reconcile it entirely with existing journal entries otherwise it would make a gap in the numbering. You should book an entry and make a regular revert of it in case you want to cancel it.'))
+         counterpart_moves.assert_balanced()
+         return counterpart_moves