The changing calculation timeframe and campaign length feature enables Shopify stores to comply with all the local variations in the EU area and also support longer campaign durations, even in cases where you lower discounted pricing during the same campaign.
Head to the Settings section of the app to:
Adjust the timeframe for calculating the lowest price
Define the maximum allowed duration for your campaigns.
Note that these are by default set to 30 and 60 days. If you choose to modify these values, make sure that they are compliant with your local regulations.