Retcon

Retroactive continuity or retcon is the adding of new information to "historical" material, or deliberately changing previously established facts in a work of serial fiction. The change itself is referred to as a "retcon", and the act of writing and publishing a retcon is called "retconning". Retconning can be done either on-purpose, or accidentally, wherein a break in continuity is not noticed until later and is then 'blessed' by later writers or editors.

Wulfram of Sens, Saint Wulfram is also known as Wulfram of Fontenelle. He lived from about 640 to March 20, 703, (though the years vary according to the authority, from birth in about 630, to death between 700 and 720). His life was recorded eleven years after he died by the monk Jonas of Fontenelle.
Wulfram of Sens, Saint Wulfram is also known as Wulfram of Fontenelle. He lived from about 640 to March 20, 703, (though the years vary according to the authority, from birth in about 630, to death between 700 and 720). His life was recorded eleven years after he died by the monk Jonas of Fontenelle.
There are churches dedicated to him in Grantham, Lincolnshire, Ovingdean, Sussex and Abbeville, in the French département of Somme. This last has his name in the form of St. Vulfran.

When Saint Boniface withdrew from his missionary work in Friesland, in order to visit Rome for the second time, Wulfram seems to have stood in for him in Friesland. There, he converted the son of King Radbod and was allowed to preach.
Even Radbod was in the queue for conversion, but just before his baptism, he asked where his ancestors were. Wulfram told him that idolaters went to Hell. Rather than be apart from his ancestors, he chose to stay as he was.