diff --git a/src/cleveragents/application/services/cross_plan_correction_service.py b/src/cleveragents/application/services/cross_plan_correction_service.py
index c9a90ebf2..a02499526 100644
--- a/src/cleveragents/application/services/cross_plan_correction_service.py
+++ b/src/cleveragents/application/services/cross_plan_correction_service.py
@@ -400,11 +400,21 @@ class CrossPlanCorrectionService:
         Best-effort: errors during undo are logged but do not prevent
         other rollbacks from being attempted.
 
+        When a cascade action fails partway through, this method is called
+        in reverse order to clean up any state already modified by
+        previously completed actions. For actions that rolled back a
+        sandbox, the sandbox is re-rolled-back (idempotent) to ensure it
+        is left in a clean state; otherwise a log entry is produced.
+
         Args:
             completed_actions: Actions that were successfully executed.
         """
         for action in reversed(completed_actions):
             try:
+                if action.sandbox_rolled_back:
+                    self._sandbox_rollbacker.rollback_child_plan_sandbox(
+                        action.child_plan_id
+                    )
                 logger.info(
                     "cross_plan_correction.rollback_action",
                     child_plan_id=action.child_plan_id,