ComboStrap\ExceptionRuntimeInternal: The page (wiki://markup>docs:metadata:date_format.txt) and the page (docs:metadata:date) have the same page_id value (lslbc2ojagbnher18956n)

An unforeseen error has occured. This is most likely a bug somewhere. It might be a problem in the combo plugin.

More info has been written to the DokuWiki error log.