Overridden function has changed

[bytesized]

CCK2 overrides the ContentLinkHandler.onLinkAdded function here:

cck2wizard/cck2/modules/CCK2.jsm

Line 802 in 6884163

ContentLinkHandler.onLinkAdded = function(event, chromeGlobal) {

That function has changed names (and maybe implementations?) since then. It is now called ContentLinkHandler.onLinkEvent.
https://searchfox.org/mozilla-central/rev/d2b4b40901c15614fad2fa34718eea428774306e/browser/modules/ContentLinkHandler.jsm#285

I assume that this feature of CCK2 does not work properly unless it overrides the correct function.