Steps to reproduce:

1.  Create a new HDRP project
2.  Create Visual Effects > Visual Effect Graph > Minimal System
3.  Add a Skinned Mesh Renderer property
4. In Output Particle node add a "set position mesh skinned mesh" block
5. Connect the Skinned Mesh Renderer property to the Set Position Mesh Skinned mesh block

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Actual results: Getting a "The input and output have incompatible types" error in the VFX graph window

Expected results: No errors appear as both input and output are the same type (skinned mesh renderer)

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Reproducible with versions: 
6000.0.60f1, 6000.2.8f1(getting different error: UUM-120233) 6000.3.0b3, 6000.3.0b6

Not reproducible with versions: 
6000.3.0b2, 6000.4.0a3

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Tested on (OS): 
MacOS Sequoia 15.7.1

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Notes:

•  Just pressing on Skinned Mesh Renderer property output removes the error