[Mediawiki-api] write API "edit conflict"

[Jim Tittsler]

I have a bot (using mwclient 0.6.2) that nightly updates some status 
pages on WikiEducator.org.  It has suddenly started failing with an 
'Edit conflict' but I can edit the page by hand and the script continues 
to write to another page.  Are there things that would prohibit the API 
from writing to a page but still allow editing through the wiki?

MediaWiki 1.14