product_name,product_code,related
testprod1,123456789,""
testprod2,987654321,123456789

THE ABOVE DATASET FAILS TO CREATE THE RELATED PRODUCT

product_name,product_code,related
testprod1,123456789xx,""
testprod2,987654321xx,123456789xx

THE ABOVE DATASET SUCCESSFULLY CREATES THE RELATED PRODUCT

product_name,product_code,related
testprod1,abcdefg,""
testprod2,tuvwxyz,abcdefg

THE ABOVE DATASET SUCCESSFULLY CREATES THE RELATED PRODUCT

product_name,product_code,related
testprod1,333,""
testprod2,444,333

THE ABOVE DATASET CREATED A RELATED PRODUCT USING AN EXISTING PRODUCT WITH ID 333 (Joomla entity ID, not product_code)

product_name,product_code,related
testprod1,333333,""
testprod2,444444,333333

THE ABOVE DATASET FAILS TO CREATE THE RELATED PRODUCT