### Godot version

4.0.beta13

### System information

Windows 10

### Issue description

When you call the `seek()` function without a current animation it outputs `Condition "!playback.current.from" is true.` to the debugger.

I was getting the error above whenever I would call `stop()` on an AnimationPlayer when it didn't have a playing animation. I realized that `stop()` also calls the `seek()` function.

I would expect the `seek()` and `stop()` functions to just do nothing, instead of throwing errors, if there isn't a current animation, or at least show an error that says that there is no animation to seek/stop.

This is the same issue that was described here: [#6122](https://github.com/godotengine/godot/issues/6122)

### Steps to reproduce

- Create an AnimationPlayer node.
- Don't have it play any animations.
- Call the `seek()` function.

### Minimal reproduction project

[seek_issue.zip](https://github.com/godotengine/godot/files/10442071/seek_issue.zip)

}
	}
	for (int i = 0; i < cache_update_prop_size; i++) {
		TrackNodeCache::PropertyAnim *pa = cache_update_prop[i];
		ERR_CONTINUE(pa->accum_pass != accum_pass);
		switch (pa->special) {
			case SP_NONE: {
				bool valid;
				pa->object->set_indexed(pa->subpath, pa->value_accum, &valid); 
#ifdef DEBUG_ENABLED
				if (!valid) {
					
					
					String key_debug;
					if (pa->subpath.size() > 0) {
						key_debug = pa->subpath[0];
						for (int subpath_index = 1; subpath_index < pa->subpath.size(); ++subpath_index) {
							key_debug += ".";
							key_debug += pa->subpath[subpath_index];
						}
					}
					ERR_PRINT("Failed setting key '" + key_debug +
							"' at time " + rtos(playback.current.pos) +
							" in Animation '" + get_current_animation() +
							"' at Node '" + get_path() +
							"', Track '" + String(pa->owner->path) +
							"'. Check if the property exists or the type of key is right for the property.");
				}
#endif
			} break;