Run the Creation Kit Downgrade Patcher and point it to your Skyrim SE installation folder.
Extract SSE CreationKit Fixes into your game folder. skyrim se creation kit 1597 patched
To understand why this specific version is sought after, you have to look at the version chaos of 2021–2022: Run the Creation Kit Downgrade Patcher and point
The Creation Kit looks for game files in specific directories. Ensure your SSEEdit or CK shortcut has skyrim se creation kit 1597 patched