The migration tool offers the option of creating multiple connections. It is also possible to switch connections.

This is particularly interesting if you want to merge several Shopware installations (or other systems such as Magento) into one Shopware 6 installation. However, if you change the profile during a migration that has not yet been completed by the user with Complete migration, the checksums are mixed up. This behavior has been confirmed by Shopware Support.

It would therefore be a good idea to add a parameter for the active connection to the checksums to prevent mixing by switching open migrations.

If this is not possible, a change of connection should be prevented as long as a migration has not been completed by the user via Complete migration.