Thanks @Jamez0r for the help!
Nick escreveuI tried delete area 3 and re-export from spine editor but still get the same result.
@Nick are you sure that there were no leftover .meta files or assets remaining? Unfortunately we could not reproduce your problem. Can you reproduce your problem every time by performing the same steps, deleting all FireMt_A3 assets (including generated materials, the atlas asset, etc) and copying the three exported assets into the directory? If so, can you please send us a reproduction zip package with the directory containing the problematic assets, plus the three FireMt_A3 assets that were assigned incorrectly? You can send it to contact@esotericsoftware.com.
As a quick resolution to the problem, I assume you have already assigned the FireMt_A3_Atlas asset at the SkeletonDataAsset shown in your lower screenshot.
