Even if you change the skin in Spine, the previous skin does not disappear

I attempted to change the skin using the Spine animation.

When I switch from the Default skin to the N skin, that skin is displayed

when I switch to the NN skin, the N+NN skin appears, but the N skin does not move and remains stationary.

If I press the key to switch back to the N skin, the NN skin remains stationary whilst the N skin moves in accordance with the bones.

Even when I press the key to revert to the Default skin, neither skin disappears; both remain fixed in place.

It appears that can only change the skin in the Edit window and must not change it afterwards.

When changing skins, there should be a function to remove the previous skin

whilst I’m not sure if this is possible with Gdevelop, there should also be a function to use multiple skins simultaneously and to exclude specific skins.

sorry. The problem was caused by placing the skins in separate bones rather than as attachments.