thepraandClaude Opus 5.5
b2570eab38
Two ledger flushes that upsert the same new day (or touch the same new instance) at once made one of them fail on the unique key, losing its counts; MongoDB retries that only for single-document updates. The loser now tries again and adds to the document the winner made. Seen as a rare failure of LedgerOverHttpTests in full runs. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01LsXgEaXee4GCU1hwYgPJXw