Ensure on hand, on order, transfer in, and transfer out quantites are all zero (they also must not be negative).
Set the TLS Status (ATTR_COD_4) = REMOVE.
Optionally set the Status (STAT) = Discontinued if applicable.
Follow the steps for Merging & Renumbering CounterPoint Items
Especially adding the old SKU as an ALT_ITEM barcode to the new SKU's barcodes.
Wait for CP+ to be updated. (usually on Mondays).
AFTER CP+ has been updated, the TLS Status in CounterPoint will be updated by CP+ to PURGE.
Delete only item(s) with a status of PURGE.