Store Import Alter Table Failure

Doing a store_import of 3.0.6 to 4.4.2.

When it tries to process the customer's tags_links table, it does an alter table to drop the user_id column.

This generates a duplicate entry error because object_type, object_id and tag_id are no longer unique (all remaining columns are the primary key). Hence the alter table fails.

I'm not sure if this poses any real problem in the end, but the table certainly could return multiple rows for a query on those three fields.

Has anyone addressed this?

Several other store_import bugs to note related to V2.2.4 to V4.4.2

1) Tables not created before being refrerenced (order_transactions and storage_data)

2) Missing product_subscriptions table after it finally completes