The stale marker changed to another local 5V_PROT trace segment (Trace 1322), still tied to C1:P1. I’m cleaning that local segment and re-checking again.

After removing the stale local segments, DRC now exposes two short 5V_PROT airwires and the board pre-check says routing is feasible. I’m running a focused routing cleanup pass now.

The C1 airwire is cleared, but the cleanup route introduced overlapping-copper DRC errors. I’m removing the offending cleanup traces/vias so we don’t leave the board with shorts, then I’ll re-check DRC.

The cleanup removed the shorts, but it opened several small local airwires/dangling traces. The board check says routing is feasible, but another route pass may introduce new conflicts; I’m stopping here rather than risking further churn.

I reworked the local C1:P1 / 5V_PROT routing and re-ran DRC. The original C1:P1 airwire was removed, but the repair route introduced other local routing issues; I removed the shorting overlaps, and the latest DRC now shows 4 airwires and 3 dangling-trace warnings, with no overlapping-copper errors in the checked set.

So the board is still not export-ready. The next safe step is a careful manual PCB edit around the affected traces rather than another blind autoroute pass, because the router is now creating cleanup churn.