These are the changes of ARK: Survival Evolved’s Patch 174.31. If not otherwise indicated, they’re quoted from the relevant Steam Thread.

• “EnablePvPGamma=true” server option will now work 😉
• Added move-and-copy logic to saving to avoid any corruptions of save or tribe data
• Fixed a stat math problem with Downloading Dinos via the Obelisks

(Original Announcement on Steam)

Here are the patchnotes of the previous patch (174.3).