ERPnext v15. Setting the item price in standard selling price list. not able to do it
It is reported as fixed bug in v14
Discussion here [BUG] Unable to edit Item Price - Item Price appears multiple times based on Price List, Supplier/Customer, Currency, Item, UOM, Qty and Dates - Bug - Frappe Forum
Note this recent fix #20347
Resolved by deleting all price items and recreating new ones from the scratch
