### Godot version

4.0.beta16

### System information

windows 10

### Issue description

whenever an animation starts playing and there is an animation track in it with at least one key, the seemingly innocuous error message gets printed:
```
ERROR: Condition "!playback.current.from" is true.
   at: seek (scene/animation/animation_player.cpp:1784)
```
It apparently doesn't cause any kind of erroneous behavior, and the other animation player seems to play the animation as expected.

### Steps to reproduce

see attached video:

https://user-images.githubusercontent.com/5783414/215481088-a0da14c0-fa1a-4921-b351-66257adb9a3a.mp4


### Minimal reproduction project

[PlayingAnimationTracksPrintsAnError.zip](https://github.com/godotengine/godot/files/10535868/PlayingAnimationTracksPrintsAnError.zip)

### Work Around

Instead of using animation playback tracks, the user can use method call tracks and call the play method in the desired animation player
return (is_playing() ? playback.assigned : "");
}
void AnimationPlayer::set_assigned_animation(const String &p_anim) {
	if (is_playing()) {
		float speed = get_playing_speed();
		play(p_anim, -1.0, speed, signbit(speed));
	} else {
		ERR_FAIL_COND_MSG(!animation_set.has(p_anim), vformat("Animation not found: %s.", p_anim));
		playback.current.pos = 0;
		playback.current.from = &animation_set[p_anim];
		playback.assigned = p_anim;
	}
}
String AnimationPlayer::get_assigned_animation() const {
	return playback.assigned;
}
void AnimationPlayer::pause() {
	_stop_internal(false, false);
}
void AnimationPlayer::stop(bool p_keep_state) {