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In Magento ver. 2.2.4 when I try to make a payment with a credit card or by Bank Transfer this exception is generated. With PayPal this does not happen and I can place orders without problems.

2018-07-11 13:50:40] main.CRITICAL: Rolled back transaction has not been completed correctly. {"exception":"[object] (Exception(code: 0): Rolled back transaction has not been completed correctly. at /home/wwwdos9/public_html/.../vendor/magento/framework/DB/Adapter/Pdo/Mysql.php:270)"}

  • Now show me other error. Unique constraint violation found – Juan Dosil Jul 11 '18 at 15:20
  • Can you show the full error? – Greg Jul 11 '18 at 16:16
  • I do not get more information either in debug.log, or in exception.log or in system.log. Where can I see the transaction that is generating the error? – Juan Dosil Jul 12 '18 at 8:18
  • Next Zend_Db_Statement_Exception: SQLSTATE[23000]: Integrity constraint violation: 1062 Duplicate entry '1200022450-1' for key 'SALES_ORDER_INCREMENT_ID_STORE_ID', query was: INSERT INTO sales_order (state, status, protect_code, shipping_description, is_virtual, store_id, customer_id, base_discount_amount, base_grand_total, base_shipping_amount, base_shipping_tax_amount, base_subtotal, base_tax_amount, base_to_global_rate, base_to_order_rate, discount_amount, grand_total, shipping_amount, shipping_tax_amount, store_to_base_rate – Juan Dosil Jul 12 '18 at 10:57
  • If you remove this order 1200022450-1 from sales_order table, it should solve the problem. – Greg Jul 12 '18 at 11:08
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This error is regrading in 'banktransfer' extension in some database transaction performing on order time.

Things to check

  • This error generally said that, your code is breaking database operation.
  • Make sure saving data is properly loaded with that model.
  • Note that save method is particularly calling model which you are loaded to save data.

This is the things you have to keep in mind.
I hope this will be helpful.

  • hello @Himanshu. I am facing this issue when i try to place the order using sagepay payment method – Manjunath Jul 22 '19 at 7:04
  • @Manjunath which event is calling please try to use *_commit_after event – Himanshu Jul 22 '19 at 7:13
  • yes, I checked in the sagepay module, they are using this event, "checkout_submit_all_after" – Manjunath Jul 22 '19 at 7:18
  • @Himanshu can you help me on this issue please magento.stackexchange.com/questions/293795/… – Nagaraju K Oct 25 '19 at 13:48
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We have been experiencing this issue across all of our Magento 2 sites. For us, switching off persistent cart (Store > Configuration > Customer > Persistent Shopping Cart) solved the issue. I really hope Magento can fix persistent cart, though, as we'd like to be able to use it again.

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