The animation_mixer gives a false warning about the value track type

[xchrix]

Godot version

v4.2.beta1.official [b137180], v4.2.dev6.official [57a6813]

System information

Godot v4.2.beta1 - Windows 10.0.19045 - GLES3 (Compatibility) - NVIDIA GeForce RTX 2060 (NVIDIA; 31.0.15.3667) - Intel(R) Core(TM) i7-10875H CPU @ 2.30GHz (16 Threads)

Issue description

When I open a scene with an animation_player and click the AnimationPlayer node, Godot gives me a warning about the type of track value:

scene/animation/animation_mixer.cpp:884 - AnimationMixer: 'IdleLeft', Value Track: 'Sprite2D:texture' uses a non-numeric type as key value with UpdateMode.UPDATE_CONTINUOUS. This will not be blended correctly, so it is forced to UpdateMode.UPDATE_DISCRETE. (User)

Actually, all texture track use Discrete update mode and Nearest interpolation mode.

The warning message:

The animation track mentioned in the warning message:

Only 4.2beta1 and 4.2dev6 was affected with this issue, versions before 4.2dev5 cannot reproduction this issue.

Steps to reproduce

• Open the reproduction project
• Open the player/player_noanimtree.tscn.
• Click the AnimationPlayer node.
• You can see the warning message as above in the Output panel.

Minimal reproduction project

min_reproduction.zip