diff --git a/apps/edge/internal/service/run_wire.go b/apps/edge/internal/service/run_wire.go
index 6bf07a41..badb07ce 100644
--- a/apps/edge/internal/service/run_wire.go
+++ b/apps/edge/internal/service/run_wire.go
@@ -2,6 +2,7 @@ package service
 
 import (
 	"fmt"
+	"sync/atomic"
 	"time"
 
 	"google.golang.org/protobuf/types/known/structpb"
@@ -10,8 +11,23 @@ import (
 	iop "iop/proto/gen/iop"
 )
 
+var lastRunIDNanos atomic.Int64
+
 func NewRunID() string {
-	return fmt.Sprintf("manual-%d", time.Now().UnixNano())
+	return newRunIDAt(time.Now().UnixNano())
+}
+
+func newRunIDAt(now int64) string {
+	for {
+		previous := lastRunIDNanos.Load()
+		next := now
+		if next <= previous {
+			next = previous + 1
+		}
+		if lastRunIDNanos.CompareAndSwap(previous, next) {
+			return fmt.Sprintf("manual-%d", next)
+		}
+	}
 }
 
 func IsNodeDisconnected(event *iop.EdgeNodeEvent) bool {
diff --git a/apps/edge/internal/service/service_internal_test.go b/apps/edge/internal/service/service_internal_test.go
index ee0ad705..838afbb4 100644
--- a/apps/edge/internal/service/service_internal_test.go
+++ b/apps/edge/internal/service/service_internal_test.go
@@ -18,6 +18,32 @@ import (
 	iop "iop/proto/gen/iop"
 )
 
+func TestRunIDRemainsUniqueAtSameClockTick(t *testing.T) {
+	const count = 128
+	ids := make(chan string, count)
+	var wg sync.WaitGroup
+	wg.Add(count)
+	for i := 0; i < count; i++ {
+		go func() {
+			defer wg.Done()
+			ids <- newRunIDAt(1)
+		}()
+	}
+	wg.Wait()
+	close(ids)
+
+	seen := make(map[string]struct{}, count)
+	for id := range ids {
+		if _, exists := seen[id]; exists {
+			t.Fatalf("duplicate run id %q", id)
+		}
+		seen[id] = struct{}{}
+	}
+	if len(seen) != count {
+		t.Fatalf("unique run ids = %d, want %d", len(seen), count)
+	}
+}
+
 // TestRefreshProviderCapacityAffectsNextDispatch verifies that a provider
 // capacity change applied via SetRuntimeConfig is reflected in the candidate
 // capacity used for the next dispatch admission, since candidates are rebuilt