I cleared my test orders from Magento 2 with these steps: https://stackoverflow.com/questions/37861046/how-to-remove-test-orders-from-magento2
However when I go to Sales->Orders at first it works. But after I create my second order the page gives an error msg:
Item (Magento\Framework\View\Element\UiComponent\DataProvider\Document) with the same ID "2" already exists.
How to solve this error?