The Elder Scrolls V Skyrim — Special Edition V1.5.97.0 [exclusive]
: Bethesda's frequent updates to the Anniversary Edition often break the Script Extender (SKSE) , forcing modders to wait for updates. 1.5.97 offers a "frozen" environment where your load order won't be broken by sudden official patches.
: Many essential mods—specifically those with .dll plugins using the Skyrim Script Extender (SKSE64) —were built for 1.5.97. When Bethesda updated the game to version 1.6 and beyond, these plugins stopped working and required complete rewrites. The Elder Scrolls V Skyrim Special Edition V1.5.97.0
Some essential technical mods, like the .NET Script Framework , only work on 1.5.97. : Bethesda's frequent updates to the Anniversary Edition