diff --git a/src/server/game/message_handler.go b/src/server/game/message_handler.go
index 8d37373b..d4cd7775 100644
--- a/src/server/game/message_handler.go
+++ b/src/server/game/message_handler.go
@@ -1253,6 +1253,9 @@ func (p *Player) AddHighOrder() {
 	OrderMod := p.PlayMod.getOrderMod()
 	BaseMod := p.PlayMod.getBaseMod()
 	ChessMod := p.PlayMod.getChessMod()
+	if len(OrderMod.LastOrder.MergeId) == 0 {
+		return
+	}
 	lastChess := OrderMod.LastOrder.MergeId[len(OrderMod.LastOrder.MergeId)-1]
 	maxId := 0
 	for k := range OrderMod.GetOrderList() {