A FrameXML template registered under a name already taken replaced the first, nothing was logged, and names differing only in case were stored twice.
In 1.12.1 the registrar `0x6ee500` folds case (`0x64b3f0`, `0x64a4c0`) and keeps the first entry, logging "Virtual object named %s already exists" (`0x871188`), unless the old entry carries a non-zero script context and the new one zero (`0x6ee594`). The stock files load at context 0; `AddOn_Load` (`0x51f240`) loads an addon under its name unless its signature checked SECURE (`0x51dbfb`).
Templates are now keyed case-folded with their context, an addon's load sets the context, an addon counts as secure only from the player's own data with `## Secure: 1`, and the refusal and the unnamed-node line (`0x871020`) reach FrameXML.log.
Tests: duplicates and case variants refused, the context rule, the log lines.
Fixes#556🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
