DP noticed that CHAR2 had been assigned twice (to Charles I in PERS1.xml and to Charterhouse [a site]). I have given Charles I the XML:id of CHAR4 and made the necessary changes in the only page that referred to Charles I (EXEC1).

[For my own reference, I went to the “People” page first and clicked on Charles I to find out which pages mention him. I made a note of the page's XML:id, then changed both PERS1.xml file and EXEC1.xml file. It’s important not to correct the XML:id before you’ve used the Personography to figure out the links.]