During this process the tool will examine each ID to see if it looks like it has been 'customized', if it doesn't look like the previous ID format or the default ID format. This might be the case if the user had entered his own text in the ID field for the object when editing it. It might also occur if the third party [[Addon:GetGOV|GetGOV Addon]] or [[Addon:GeoName|GeoName Addon]] has been used, as that tool stores the GOV ID in the ID field. If a 'customized' ID is found, it will ask the user if he really wants to replace the ID. The dialog also allows the user to use the same answer for other customized IDs found.