cannot issue credit memo with MSI active for orders that were placed in older magento versions without MSI active

[ioweb-gr]

Preconditions (*)

2. Environment: Magento 2.4.6

Steps to reproduce (*)

1. Install Magento 2 without MSI modules active (e.g., 2.1, 2.2).
2. Upgrade to Magento 2.4.6-p2.
3. Enable MSI.
4. Attempt to issue a credit memo for orders that were shipped in the old way.

Expected result (*)

1. Credit memo issuance should work correctly for orders shipped in the old way.

Actual result (*)

1. An issue occurs due to the absence of a record in the inventory_shipment_source table for the sales_shipment_item related to the default source.

[Additional details, error messages, and logs if available]

[m2-assistant[bot]]

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