Your Windows registry or patcher failed. The EscapeFromTarkov_Data\Managed\Assembly-CSharp.dll still references a newer version.

For modders (specifically users of the Single Player Tarkov project), this version acts as a "frozen state"—allowing players to experience the 0.14 meta (recoil changes, new BTR mechanics) without forced live updates.

: SPT 3.9.0 was specifically built to work with EFT live patch 0.14.9.1.30626.

Build represents a specific pivot point in the game's history. By the time this build went live, the initial hype of the 0.14 wipe had settled, and the "mid-wipe blues" had begun to set in.