Your requirements could not be resolved to an installable set of packages. Problem 1 - Root composer.json requires cviebrock/eloquent-sluggable ^11.0|^12.0|^13.2 -> satisfiable by cviebrock/eloquent-sluggable[11.0.0, 11.0.1, 12.0.0]. - Root composer.json requires laravel/framework 13.5.* -> satisfiable by laravel/framework[v13.5.0]. - cviebrock/eloquent-sluggable[11.0.0, ..., 11.0.1] require illuminate/support ^11.0 -> satisfiable by illuminate/support[v11.0.0, ..., 11.x-dev]. - cviebrock/eloquent-sluggable 12.0.0 requires illuminate/support ^12.0 -> satisfiable by illuminate/support[v12.0.0, ..., 12.x-dev]. - Only one of these can be installed: illuminate/support[dev-master, v11.0.0, ..., 11.x-dev, v12.8.0, ..., 12.x-dev, v13.0.0, ..., 13.x-dev], laravel/framework[v13.5.0]. They all replace spatie/once and thus cannot coexist.