You may have got integrity constraint violation error while creating an order from the backend in Magento 2 store.
When you face this error, it means that a duplicate value is created in the database table.
Here’s the solution to fix unique constraint violation in Magento 2 admin panel.
Steps to Fix Unique Constraint Violation Found in Magento 2:
Check the table “sequence_order_1
” where 1 refers to the store id.
In the above table, the sequence_value column should be auto_increment
to fix the integrity constraint violation in Magento 2.
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