I also encountered such a hint. Basically, this hint appears when I copy an event from VS to another object, but it seems to have little impact on the game. It just means that the event you are using is not from the original object. Perhaps that is the intended meaning…
I don’t know the reproduction steps, but I also see more than 10 items lined up at startup, so I assumed that’s just how it is. It’s probably a common error.
Basically, this error is a system designed to prevent accidental modifications in the “Modify Property” action.
Currently, the script screen automatically switches according to the scene, so this typically does not occur. However:
Open the Visual Script screen for Object A.
While keeping the Visual Script for Object A open, switch only the Scene tab to Object B.
In this state, attempting to modify a specified property in the “Modify Property” inspector will try to read data from Object B, resulting in a data loading failure.
The “Modify Property” action gets overwritten using the failed loading data, causing the property modification for Object A to break without notice.
To prevent this, a lock is applied to the “Modify Property” inspector at step 2, and this error (or rather, execution message) is triggered as a result.
Therefore, it is currently in a state where this message is being displayed, possibly due to some cause (likely a copy of an execution action) triggering it unintentionally.
I feel this is not incorrect; it is a hint provided by the system. Since I have extensively used copy-paste behavior in my projects, this hint has accumulated quite a bit, but it seems to cause no issues.