diff --git a/legacyver/proto/container.go b/legacyver/proto/container.go
index 87f88ba..e45475c 100644
--- a/legacyver/proto/container.go
+++ b/legacyver/proto/container.go
@@ -28,7 +28,7 @@ func (x *FullContainerName) Marshal(r protocol.IO) {
 	r.Uint8(&x.ContainerID)
 	if IsProtoGTE(r, ID729) {
 		protocol.OptionalFunc(r, &x.DynamicContainerID, r.Uint32)
-	} else {
+	} else if IsProtoGTE(r, 712) {
 		dynamicContainerID, _ := x.DynamicContainerID.Value()
 		r.Uint32(&dynamicContainerID)
 		if dynamicContainerID != 0 {
diff --git a/legacyver/proto/item_stack.go b/legacyver/proto/item_stack.go
index 8e946fa..ac8cded 100644
--- a/legacyver/proto/item_stack.go
+++ b/legacyver/proto/item_stack.go
@@ -1044,13 +1044,7 @@ func (x *StackRequestSlotInfo) FromLatest(y protocol.StackRequestSlotInfo) Stack
 
 // StackReqSlotInfo reads/writes a StackRequestSlotInfo x using IO r.
 func StackReqSlotInfo(r protocol.IO, x *StackRequestSlotInfo) {
-	if IsProtoGTE(r, ID712) {
-		protocol.Single(r, &x.Container)
-	} else {
-		containerID := x.Container.ContainerID
-		r.Uint8(&containerID)
-		x.Container.ContainerID = containerID
-	}
+	protocol.Single(r, &x.Container)
 	r.Uint8(&x.Slot)
 	r.Varint32(&x.StackNetworkID)
 }