Hey, thanks for the report. This is a known issue. Cursor doesn’t support the Secondary Sidebar yet, and Claude Code registers view containers for both the Activity Bar and the Secondary Sidebar. Cursor redirects both into the Activity Bar, which is why you see a duplicate.
More details: Secondary Sidebar not supported
You can’t remove the second icon right now. The Hide context menu option doesn’t work because of the custom Activity Bar implementation. As a workaround, you can set up Claude Code via the Side Panel so you don’t rely on the icons at all. Guide: Claude Code Side Panel (Chat Panel) Setup Guide