diff --git a/src/Eloquent/HybridRelations.php b/src/Eloquent/HybridRelations.php
index bb544f9ae..ee096bc89 100644
--- a/src/Eloquent/HybridRelations.php
+++ b/src/Eloquent/HybridRelations.php
@@ -29,7 +29,7 @@ trait HybridRelations
     public function hasOne($related, $foreignKey = null, $localKey = null)
     {
         // Check if it is a relation with an original model.
-        if (! is_subclass_of($related, \Jenssegers\Mongodb\Eloquent\Model::class)) {
+        if (! is_subclass_of($related, Model::class)) {
             return parent::hasOne($related, $foreignKey, $localKey);
         }
 
@@ -55,7 +55,7 @@ public function hasOne($related, $foreignKey = null, $localKey = null)
     public function morphOne($related, $name, $type = null, $id = null, $localKey = null)
     {
         // Check if it is a relation with an original model.
-        if (! is_subclass_of($related, \Jenssegers\Mongodb\Eloquent\Model::class)) {
+        if (! is_subclass_of($related, Model::class)) {
             return parent::morphOne($related, $name, $type, $id, $localKey);
         }
 
@@ -79,7 +79,7 @@ public function morphOne($related, $name, $type = null, $id = null, $localKey =
     public function hasMany($related, $foreignKey = null, $localKey = null)
     {
         // Check if it is a relation with an original model.
-        if (! is_subclass_of($related, \Jenssegers\Mongodb\Eloquent\Model::class)) {
+        if (! is_subclass_of($related, Model::class)) {
             return parent::hasMany($related, $foreignKey, $localKey);
         }
 
@@ -105,7 +105,7 @@ public function hasMany($related, $foreignKey = null, $localKey = null)
     public function morphMany($related, $name, $type = null, $id = null, $localKey = null)
     {
         // Check if it is a relation with an original model.
-        if (! is_subclass_of($related, \Jenssegers\Mongodb\Eloquent\Model::class)) {
+        if (! is_subclass_of($related, Model::class)) {
             return parent::morphMany($related, $name, $type, $id, $localKey);
         }
 
@@ -142,7 +142,7 @@ public function belongsTo($related, $foreignKey = null, $otherKey = null, $relat
         }
 
         // Check if it is a relation with an original model.
-        if (! is_subclass_of($related, \Jenssegers\Mongodb\Eloquent\Model::class)) {
+        if (! is_subclass_of($related, Model::class)) {
             return parent::belongsTo($related, $foreignKey, $otherKey, $relation);
         }
 
@@ -211,13 +211,13 @@ public function morphTo($name = null, $type = null, $id = null, $ownerKey = null
     /**
      * Define a many-to-many relationship.
      *
-     * @param string $related
-     * @param string $collection
-     * @param string $foreignKey
-     * @param string $otherKey
-     * @param string $parentKey
-     * @param string $relatedKey
-     * @param string $relation
+     * @param class-string<\Illuminate\Database\Eloquent\Model> $related
+     * @param string|null $collection
+     * @param string|null $foreignKey
+     * @param string|null $otherKey
+     * @param string|null $parentKey
+     * @param string|null $relatedKey
+     * @param string|null $relation
      * @return \Illuminate\Database\Eloquent\Relations\BelongsToMany
      */
     public function belongsToMany(
@@ -237,7 +237,7 @@ public function belongsToMany(
         }
 
         // Check if it is a relation with an original model.
-        if (! is_subclass_of($related, \Jenssegers\Mongodb\Eloquent\Model::class)) {
+        if (! is_subclass_of($related, Model::class)) {
             return parent::belongsToMany(
                 $related,
                 $collection,
@@ -249,6 +249,7 @@ public function belongsToMany(
             );
         }
 
+
         // First, we'll need to determine the foreign key and "other key" for the
         // relationship. Once we have determined the keys we'll make the query
         // instances as well as the relationship instances we need for this.
@@ -256,6 +257,10 @@ public function belongsToMany(
 
         $instance = new $related;
 
+        if ($otherKey === $relation) {
+            throw new \LogicException(sprintf('In %s::%s(), the key cannot be identical to the relation name "%s". The default key is "%s".', static::class, $relation, $relation, $instance->getForeignKey().'s'));
+        }
+
         $otherKey = $otherKey ?: $instance->getForeignKey().'s';
 
         // If no table name was provided, we can guess it by concatenating the two
@@ -301,7 +306,7 @@ protected function guessBelongsToManyRelation()
      */
     public function newEloquentBuilder($query)
     {
-        if (is_subclass_of($this, \Jenssegers\Mongodb\Eloquent\Model::class)) {
+        if (is_subclass_of($this, Model::class)) {
             return new Builder($query);
         }
 
diff --git a/tests/Models/Group.php b/tests/Models/Group.php
index 71386fca8..7aa819b45 100644
--- a/tests/Models/Group.php
+++ b/tests/Models/Group.php
@@ -15,6 +15,6 @@ class Group extends Eloquent
 
     public function users(): BelongsToMany
     {
-        return $this->belongsToMany(User::class);
+        return $this->belongsToMany(User::class, 'users', 'groups', 'userIds', '_id', '_id', 'users');
     }
 }
diff --git a/tests/Models/User.php b/tests/Models/User.php
index 36d6d19ff..1b38d3524 100644
--- a/tests/Models/User.php
+++ b/tests/Models/User.php
@@ -79,7 +79,12 @@ public function clients()
 
     public function groups()
     {
-        return $this->belongsToMany(Group::class);
+        return $this->belongsToMany(Group::class, 'groups', 'users', 'groupIds', '_id', '_id', 'groups');
+    }
+
+    public function otherGroups()
+    {
+        return $this->belongsToMany(Group::class, 'groups', 'users', 'otherGroups', '_id', '_id', 'groups');
     }
 
     public function photos()
diff --git a/tests/RelationsTest.php b/tests/RelationsTest.php
index 969fdb0a6..044f30bca 100644
--- a/tests/RelationsTest.php
+++ b/tests/RelationsTest.php
@@ -344,8 +344,8 @@ public function testBelongsToManyCustom(): void
         $group = Group::find($group->_id);
 
         // Check for custom relation attributes
-        $this->assertArrayHasKey('user_ids', $group->getAttributes());
-        $this->assertArrayHasKey('group_ids', $user->getAttributes());
+        $this->assertArrayHasKey('userIds', $group->getAttributes());
+        $this->assertArrayHasKey('groupIds', $user->getAttributes());
 
         // Assert they are attached
         $this->assertContains($group->_id, $user->groups->pluck('_id')->toArray());