When performing partial migrations it is important to be aware that some data is dependent on others. For example, while it is possible to migrate a Product this data will not be complete unless the brands, categories, variations etc have been migrated. If data integrity is important then rather use the complete migration option instead.
I list of known data migration issues can be found here.
Function | Dependency |
Products | Brands, Categories |
Bulk Pricing Rules | Products |
Complex Rules | Products |
Custom Fields | Products |
Product Images | Products |
Metafields | Products |
Modifiers | Products |
Reviews | Products |
Variants and Options | Products |
Product Videos | Products |
Redirects | Products |
Customs Information | Products, Shipping Providers |
Price Lists | Products |
Brands | None |
Categories | None |
Pages | Widgets, Theme (Parent Navigation Menu) |
Blog Posts | None |
Customers | None |
Orders | Customers, Products, Payment Options |
Subscribers | None |
Shipments | Orders, Shipment Providers |
Channels | None |
Email Templates | None |
Store Settings | None |
Tax Classes | None |
Wishlists | Customers, Products |
...