diff --git a/middleware/distributor.go b/middleware/distributor.go
index a70ed41..e2b8f2a 100644
--- a/middleware/distributor.go
+++ b/middleware/distributor.go
@@ -108,6 +108,10 @@ func Distribute() func(c *gin.Context) {
 				abortWithMessage(c, http.StatusServiceUnavailable, message)
 				return
 			}
+			if channel == nil {
+				abortWithMessage(c, http.StatusServiceUnavailable, fmt.Sprintf("当前分组 %s 下对于模型 %s 无可用渠道（数据库一致性已被破坏）", userGroup, modelRequest.Model))
+				return
+			}
 		}
 		c.Set("channel", channel.Type)
 		c.Set("channel_id", channel.Id)