stock_inventory_scrap_backdate/security/ir.model.access.csv

1	id	name	model_id:id	group_id:id	perm_read	perm_write	perm_create	perm_unlink
2	access_stock_inventory_backdate_user	stock.inventory.backdate.user	model_stock_inventory_backdate	stock.group_stock_user	1	1	1	1
3	access_stock_inventory_backdate_line_user	stock.inventory.backdate.line.user	model_stock_inventory_backdate_line	stock.group_stock_user	1	1	1	1