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The "(WARNING: Pre-SoT)" will slowly be phased out. If you see it in an article, just remove it.
Here at underlightwiki.com, we believe it is important that even old Underlight history is maintained and available to dreamers. Too much blood and sweat went into much of the old histories to just write them off into the past never to be seen again. Old Underlight content at your finger tips can also be used as another tool to, for example, spot OOC.