Jakub Zych d20f14fe67 fix: undo locks its history entries and marks them only once (WR-11) ...

Two concurrent undos of one entry both passed the already-undone check and
both restored. Undo and UndoBatch now read the entries FOR UPDATE, and the
final mark is conditional on undone_at IS NULL, refusing with
already_undone when another undo got there first.

2026-10-27 15:30:13 +01:00

16 KiB

Raw Blame History

View Raw