Edit-war Definition

noun

(Wiktionary and WMF jargon) A dispute over the content of a page on a wiki or other editable work.

As with dinner-table discussions, it is best to avoid editing articles about politics or religion unless one wishes to become entrenched in a perpetual edit war.
Wiktionary
verb
(Wiktionary and WMF jargon) To engage in such a dispute.
When a dispute arises, it is common to see a page protected to avoid edit warring.
Wiktionary