Extension:External Data/Clearing data

You can clear all external data that has already been retrieved, so that it doesn't conflict with calls to retrieve external data further down the page. The most likely case in which this is useful is when data is retrieved and displayed in a template that is called more than once on a page. To clear the data, just call " ". Note that the ":" has to be there at the end of the call, or else MediaWiki will ignore the parser function.

There is no way to clear the values for only one field; #clear_external_data erases the entire set of data.