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Import Sequence Number is an internal field (whole number), that acts as a unique identifier of the data import or data migration that created this record that ensures data consistency

To enable the feature, log in to Power Platform Admin Center https://admin.powerplatform.microsoft.com/environments Environment >> Settings >> Features and enable it We can specify 30 days as the maximum recovery time.

As we are aware the classic themes do not apply to the new modern refreshed look, however using the new modern themes at least for now we can modify the

Mayank Pujara’s AutoNumberUpdater plugin for the XrmToolBox is a great tool to add missing auto number values to an auto number field for an entity/table. In his blog you can