What does this message in the History mean? : “We started to track this source when this property was already inside their portfolio.”

The CASAFARI History intends to show the dates of introduction and any change of information about the property. However, by entering a new source (website) in the system, CASAFARI identifies the property on a date when it was already listed on the website itself. In these cases, as it is not possible to determine a specific date for the introduction of the property, we put this message associated with the date on which we started monitoring that particular website.