Order relation child is not set during edit operation.

[dankocherga]

Order relation child is not set during edit operation.

Preconditions

Magento v2.1.7

Steps to reproduce

1. Create an order
2. Edit the order through admin panel
3. Check relation_child_idand relation_child_real_id fields of the old order.

Expected result

1. relation_child_idand relation_child_real_id fields are set to the IDs of the new order.
2. Link to the new order is displayed on old order's admin page

Actual result

1. Fields are null in the database
2. Link to the new order is not displayed on old order's admin page

The problem seems to be related to how these fields are set: https://github.com/magento/magento2/blob/2.1.7/app/code/Magento/Sales/Model/AdminOrder/Create.php#L1878-L1882

The old order is not saved in that code segment.

[VasylShvorak]

@dankocherga Thanks for reporting this issue. Created internal issue MAGETWO-71006 to investigate and track this issue.