wiki edit conflicts

[KevinAFD]

What does it mean if you keep trying to edit a wiki but keep getting back "edit conflict" error messages?

[suwunk]

An edit conflict occurs when a shared document is being edited by more than one person at the same time and a conflict is generated. One person attempts to edit the document, but upon trying to save the new version, another person has already modified the document in the intervening time period, thus causing a difference between the attempted edit and the already-made edit that must be resolved manually.
Edit conflict - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Edit_conflict)