Steps to reproduce:

1. Create a new Unity project using the Universal 3D template
2. Install the Visual Effect Graph package
3. Create a new Simple Loop Visual Effect Graph (Assets > Create > Visual Effects > Visual Effect Graph)
4. Open the newly created Simple Loop Visual Effect Graph
5. Create a new "Random Selector Weighted" node
6. Connect the "Random Selector Weighted" node's output to the Drag Coefficient
7. Observe the Visual Effect Graph
8. Delete the "Random Selector Weighted" node and its connection
9. Save the Visual Effect Graph
10. Repeat step 7

Actual results: The “An edge with the same input and output already exists” error does not disappear and remains forever until the Visual Effect Graph is reopened

Expected results: The “An edge with the same input and output already exists” error disappears

Reproducible with versions: 6000.0.60f1, 6000.2.8f1, 6000.3.0b6, 

Can’t test with versions: 6000.4.0a2 (no error messages appear due to UUM-121702)

Tested on (OS): MacOS Silicon Sequoia 15.6.1

Notes:

• The error message still remains even after deleting the connection or the "Random Selector Weighted" node and saving the Visual Effect Graph

• Closing the Visual Effect Graph and reopening it seems to be the only way to get rid of the error message