fix eager loading retroactively laravel/framework#51825

src/Eloquent/CustomRelations/RelationCleverTrait.php

@@ -11,7 +11,7 @@ trait RelationCleverTrait
     /**
      * Indicates if the relation is adding constraints.
      */
-    protected static bool $constraints = true;
+    protected static $constraints = true;
 
     /**
      * Run a callback with constraints disabled on the relation based on relationName.