The Master database is used to ease store management operations for owners.
However, you can opt to stop synchronizing prices from the Master if you want the stores to have more freedom over their inventory pricing. Here's how to unsync prices:
How to stop price synchronization across all your inventory
Access your Alice POS settings.
In the new window, go to the Inventory tab
Uncheck the option titled Automatically accept submaster's price change under Synchronization Options.
Unsynching prices by product
In the Inventory module.
Select Catalog list.
Find the product shared from the Master database you want to unsync.
Double-click on it to prompt the Edit Price List window.