diff --git a/src/assets/delete-project-asset.ts b/src/assets/delete-project-asset.ts
index 69f6cbe1..1936aeab 100644
--- a/src/assets/delete-project-asset.ts
+++ b/src/assets/delete-project-asset.ts
@@ -22,6 +22,7 @@ function removeInvalidatedInteractionLinks(
           return silencedSoundEmitterIds.has(link.action.targetSoundEmitterId);
         case "control":
           switch (link.action.effect.type) {
+            case "setProjectTimePaused":
             case "setActorPresence":
             case "playActorAnimation":
             case "followActorPath":
diff --git a/src/runtime-three/runtime-project-scheduler.ts b/src/runtime-three/runtime-project-scheduler.ts
index c044fb04..8f911c39 100644
--- a/src/runtime-three/runtime-project-scheduler.ts
+++ b/src/runtime-three/runtime-project-scheduler.ts
@@ -613,6 +613,10 @@ function cloneDiscreteStateAsEffect(
   state: RuntimeResolvedControlState["discrete"][number]
 ): ControlEffect {
   switch (state.type) {
+    case "projectTimePaused":
+      throw new Error(
+        "Project time pause is intentionally not cloned into scheduler routine effects because pausing the scheduler clock would deadlock time progression."
+      );
     case "actorPresence":
       return createSetActorPresenceControlEffect({
         target: state.target,
diff --git a/src/scheduler/project-schedule-control-options.ts b/src/scheduler/project-schedule-control-options.ts
index 73e94467..20a08f2f 100644
--- a/src/scheduler/project-schedule-control-options.ts
+++ b/src/scheduler/project-schedule-control-options.ts
@@ -534,6 +534,10 @@ export function getProjectScheduleEffectOptionId(
   effect: ControlEffect
 ): ProjectScheduleEffectOptionId {
   switch (effect.type) {
+    case "setProjectTimePaused":
+      throw new Error(
+        "Project time pause is intentionally not exposed in the schedule editor because a scheduler routine cannot safely pause its own project clock."
+      );
     case "setActorPresence":
       return effect.active ? "actor.present" : "actor.hidden";
     case "playActorAnimation":