diff --git a/server/wheelserver/mt/export.go b/server/wheelserver/mt/export.go
index 286c880b..4d924a13 100644
--- a/server/wheelserver/mt/export.go
+++ b/server/wheelserver/mt/export.go
@@ -49,7 +49,7 @@ var Table = f5.New(func(this *table) {
 
 	this.Global = f5.New(func(this *GlobalTable) {
 		this.FileName = "../res/global@global.json"
-		this.PrimKey = "id"
+		this.PrimKey = "type"
 	})
 
 	this.Reward = f5.New(func(this *RewardTable) {
diff --git a/server/wheelserver/mt/global.go b/server/wheelserver/mt/global.go
index cc9f31d5..aaa67573 100644
--- a/server/wheelserver/mt/global.go
+++ b/server/wheelserver/mt/global.go
@@ -15,5 +15,9 @@ type GlobalTable struct {
 
 func (this *GlobalTable) GetDice() int32 {
 	meta := this.GetById(1)
-	return meta.GetNumber()
+	if meta == nil {
+		return 0
+	} else {
+		return meta.GetNumber()
+	}
 }