Run multiple sales at once
You can run as many sales at the same time as you need, with the same or different start and end times - say, 30% off one collection all month and a weekend flash sale on another.
The one rule: a product should only be in one active sale. Two sales discounting the same product would fight over its price and restore the wrong original.
The app helps catch the obvious cases. Duplicate protection blocks a new sale whose targeting overlaps a scheduled or running sale that selects products the same way - the same collections, the same products, or the same tags, with overlapping time windows. It can’t detect every overlap across different targeting methods (say, a collection-based sale and a product-based sale that both contain the same product), so keep your selections apart yourself.
If a new sale won’t create, check its product selection against the sales already scheduled or running. To change which sale covers a product, disable the current sale first, then create the new one.