Data from Data Mart (ACD) always takes precedence. When importing a product from Data Mart, we will acquire values for all properties from Data Mart first and after these values have been stored on the entity, we will then synchronize with PCID and/or FireDb to acquire any additional values. This precedence can be configured using the Map Properties action. For example, if a customer prefers the Boiling Point information from PCID over ACD, they can simply remove the mapping that acquires the Boiling Point from Data Mart, but leave the mapping that acquires the Boiling Point from PCID. This will cause the system to ignore any Boiling Point values from Data Mart and only synchronize Boiling Point values from PCID.