Product_db command issue: Possible duplication due to variation using ProductVariation.objects.create

[sathishantonlinuxs]

Product_db command issue: Possible duplication due to just "objects.create" rather than "objects.get_or_create":

variation = ProductVariation.objects.create(
# strip whitespace
sku=row[SKU].replace(" ", ""),
product=product,
)

Where as all other commands use:
product, created = Product.objects.get_or_create(title=row[TITLE])
base_cat, created = Category.objects.get_or_create(title=row[CATEGORY])
sub_cat, created = Category.objects.get_or_create(
shop_cat, created = Category.objects.get_or_create(title="Shop")
image, created = ProductImage.objects.get_or_create(
new_option, created = ProductOption.objects.get_or_create(

Changing variation to objects.get_or_create causes some other indexing errors.

Any Special reason why variation alone uses "objects.create" whereas the others use "objects.get_or_create".