Why were the client IDs not moved when migrating a few stores?

Unfortunately, during Magento, OpenCart and PrestaShop multi-store migration such additional options are not available:

• Preserve customer IDs on the Target store;
• Preserve order IDs on the Target store;
• Preserve product IDs on the Target store;
• Preserve Category IDs on the Target store.

Nonetheless, during Magento multi-store migration additional option “Preserve order IDs on the Target store” is available. If you still have some questions feel free to contact our Support Team.