Can't place order after migration data from M1 to M2

When I try to place an order, it shows "Please choose a valid discount amount."

Solution:

Section responsible for that error looks like

 // Check if discount amount not negative
 if ($this->hasDiscountAmount()) {
 if ((int)$this->getDiscountAmount() < 0) {
 throw new \Magento\Framework\Exception\LocalizedException(__('Please choose a valid discount amount.'));
 }
 }

Check your cart rules after migration cause this error is thrown when the applied discount amount is less than 0.