I can't rotate my mesh .glb object

My code:

BABYLON.SceneLoader.ImportMesh("", "/images/", "enemy.glb", scene, function (newMeshes) {
        let enemy = newMeshes[0]

        //Scale the model down
        enemy.position.z = -20
        enemy.rotation.y = Math.PI / 2

        const stopManAnim = scene.getAnimationGroupByName("PlayerRunning");
        stopManAnim.start(true, 1.0, stopManAnim.from, stopManAnim.to, false);

Hard to say without taking a look at a PG but I guess nesMeshes[0] rotation is replaced by the animation.
Add a parent transform to newMeshes[0] and rotate it.