error occurring when i try to install .net sdk 1.0.1

### Describe the bug.

the pop-up reads as follows, i run ubunu 26.04 resolute raccoon

An error occurred while installing .NET: A custom dotnet installation exists.
If we were to install another .NET, we would break your custom .NET installation, so the installation request has been refused.
If you would like to proceed with installing .NET automatically for VS Code, you must remove this custom installation.
Your custom install is located at: /usr/bin

### Please attach log file(s) here if you have any.

The log file location should be copied to your clipboard if you came from VS Code.

### Reproduction Steps

just installing so i can test it out with a basic hello world, not much else to tell

### Expected Behavior

installation

### Exceptions & Errors (if any)

_No response_

### .NET Install Tool Version

.net 10.0 (10.0.1xx)

### Your operating system? Please provide more detail, such as the version and or distro above.

Linux

### VS Code Version

1b50d58d updated at 6/10/2026

No repository file, test, or log entry point is named. Start by reproducing the VS Code .NET installation on Ubuntu 26.04 with an existing installation at /usr/bin, then inspect the extension's installation flow and available logs; done means the reported refusal is either handled correctly or the installation succeeds without breaking the custom installation.

Written by the indexing model from the issue text.