3204591 - "Combination of Customer Partner X for Product Number Y Already Exists": Error when Migrating Materials

When trying to upload Customer Product numbers, the system is throwing an error, that similar entry already exists in source record.

SAP Business ByDesign

1.Go to Business Configuration work center
2.Select Overview subview
3.Select Activities
4.Search for activity Migration of Materials
5.Select Migrate Materials using the migration tool
6.Upload a file and select execute migration step by step
7.System throws the above mentioned error

The current system behavior is to check unique Customer Partner ID against a Customer.

The following conditions should be met in order to migrate the file:

• Customer Partner ID should be unique for each Product or Customer
• Do not maintain the same Customer Partner ID of the same Customer ID to different product ID
• Different material ID cannot have the same Customer ID and the same Customer Partner ID in the system
• An error appears, if there is duplicate found by the system for Customer Partner ID

Product Numbers; Product ID; similar entry already exists;  Customer Partner; Customer Part; Products with multiple customers , KBA , AP-PRD-MIG , Product Data Migration and Replication , Problem