Getting errors UPDATING an Item in a Price List in Bulk using Import Price Lists Batch FBDI

While trying to UPDATE an existing Price Lists' Items and Charges, getting the following errors:

1. primary_pricing_uom_flag - Only one price list item record can be the primary pricing UOM for a combination of item and line type.
2. item_number - The value of the attribute Item Number isn't valid.
3. The request to do the operation failed because the record doesn't exist.

There were 4000 records in the FBDI, for 5 different Price Lists. 2400+ were successfully imported while the rest failed due to the above mentioned issues.

Also, I noticed that the same Price List has 2 different SOURCE_PRICE_LIST_IDs in QP_PRICE_LISTS_INT table, and both of them are imported.