diff --git a/src/Illuminate/Database/Eloquent/Concerns/QueriesRelationships.php b/src/Illuminate/Database/Eloquent/Concerns/QueriesRelationships.php
index f9f21536d1fc..b7955bd111a9 100644
--- a/src/Illuminate/Database/Eloquent/Concerns/QueriesRelationships.php
+++ b/src/Illuminate/Database/Eloquent/Concerns/QueriesRelationships.php
@@ -803,7 +803,7 @@ public function whereAttachedTo($related, $relationshipName = null, $boolean = '
         $this->has(
             $relationshipName,
             boolean: $boolean,
-            callback: fn (Builder $query) => $query->whereKey($relatedCollection),
+            callback: fn (Builder $query) => $query->whereKey($relatedCollection->pluck($related->getKeyName())),
         );
 
         return $this;
diff --git a/tests/Database/DatabaseEloquentBuilderTest.php b/tests/Database/DatabaseEloquentBuilderTest.php
index 96a6beed7e20..09146044a349 100755
--- a/tests/Database/DatabaseEloquentBuilderTest.php
+++ b/tests/Database/DatabaseEloquentBuilderTest.php
@@ -1282,6 +1282,7 @@ public function testWhereAttachedTo()
     {
         $related = new EloquentBuilderTestModelFarRelatedStub;
         $related->id = 49;
+        $related->name = 'test';
 
         $builder = EloquentBuilderTestModelParentStub::whereAttachedTo($related, 'roles');
 
@@ -1292,9 +1293,11 @@ public function testWhereAttachedToCollection()
     {
         $model1 = new EloquentBuilderTestModelParentStub;
         $model1->id = 3;
+        $model1->name = 'test3';
 
         $model2 = new EloquentBuilderTestModelParentStub;
         $model2->id = 4;
+        $model2->name = 'test4';
 
         $builder = EloquentBuilderTestModelFarRelatedStub::whereAttachedTo(new Collection([$model1, $model2]), 'roles');
 
diff --git a/tests/Database/DatabaseEloquentIntegrationTest.php b/tests/Database/DatabaseEloquentIntegrationTest.php
index 1d176afa00f1..c27cbfe476b1 100644
--- a/tests/Database/DatabaseEloquentIntegrationTest.php
+++ b/tests/Database/DatabaseEloquentIntegrationTest.php
@@ -173,6 +173,7 @@ protected function createSchema()
 
             $this->schema($connection)->create('achievements', function ($table) {
                 $table->increments('id');
+                $table->integer('status')->nullable();
             });
 
             $this->schema($connection)->create('eloquent_test_achievement_eloquent_test_user', function ($table) {
@@ -1497,7 +1498,7 @@ public function testWhereAttachedTo()
         $user1 = EloquentTestUser::create(['email' => 'user1@gmail.com']);
         $user2 = EloquentTestUser::create(['email' => 'user2@gmail.com']);
         $user3 = EloquentTestUser::create(['email' => 'user3@gmail.com']);
-        $achievement1 = EloquentTestAchievement::create();
+        $achievement1 = EloquentTestAchievement::create(['status' => 3]);
         $achievement2 = EloquentTestAchievement::create();
         $achievement3 = EloquentTestAchievement::create();
 
@@ -2988,6 +2989,7 @@ class EloquentTestAchievement extends Eloquent
     public $timestamps = false;
 
     protected $table = 'achievements';
+    protected $guarded = [];
 
     public function eloquentTestUsers()
     {