Animation event 'new event' has no receiver

What a…? I just imported object with simple 3D model with simple animation (rotating pointer arrow) and every loop I have a message in debug log: “Animation event ‘new event’ has no receiver! Are you missing a component?”

It is very strange, because I have no any scripts interacting with this object or it’s animation.

Seems like I solved my problem. I don remember how, but seems like I have created epty New Event on animation clip, because deleting of model re-export cleared this message and it is not appears now. I wonder why animation events is not shown on a timeline o_O