diff --git a/server/wheelserver/api/v1/activity/activity.go b/server/wheelserver/api/v1/activity/activity.go
index 6bc35918..bcd8af48 100644
--- a/server/wheelserver/api/v1/activity/activity.go
+++ b/server/wheelserver/api/v1/activity/activity.go
@@ -89,12 +89,17 @@ func (this *ActivityApi) RollDice(c *gin.Context) {
 		f5.RspErr(c, 500, "server internal error7")
 		return
 	}
-	gridMeta := mt.Table.MapGrid.GetById(int64(user.CurrGrid + rspObj.Point))
-	if gridMeta == nil {
-		f5.RspErr(c, 500, "server internal error7")
-		return
+	var gridMeta *mt.MapGrid
+	if user.CurrGrid + rspObj.Point > mt.Table.MapGrid.GetMaxGridId() {
+
+	} else {
+		gridMeta = mt.Table.MapGrid.GetById(int64(user.CurrGrid + rspObj.Point))
+		if gridMeta == nil {
+			f5.RspErr(c, 500, "server internal error7")
+			return
+		}
+		user.CurrGrid += rspObj.Point
 	}
-	user.CurrGrid += rspObj.Point
 	user.UpdateFields([]string{"curr_grid"})
 	items := gridMeta.GetRewardItems()
 	if items == nil {