diff --git a/library/think/model/relation/BelongsTo.php b/library/think/model/relation/BelongsTo.php
index b5753ea3..5a7ebda0 100644
--- a/library/think/model/relation/BelongsTo.php
+++ b/library/think/model/relation/BelongsTo.php
@@ -101,7 +101,6 @@ class BelongsTo extends OneToOne
 
         return $this->parent->db()->alias($model)
             ->field($fields)
-            ->group($model . '.' . $this->foreignKey)
             ->join([$table => $relation], $model . '.' . $this->foreignKey . '=' . $relation . '.' . $this->localKey, $this->joinType)
             ->where($where);
     }