Detailed steps to reproduce the problem?

```
func IsDuplicateKeyError(err error) bool {
if se := ServerError(nil); errors.As(err, &se)

{ return se.HasErrorCode(11000) || // Duplicate key error. se.HasErrorCode(11001) || // Duplicate key error on update. // Duplicate key error in a capped collection. See SERVER-7164. se.HasErrorCode(12582) || // Mongos insert error caused by a duplicate key error. See // SERVER-11493. se.HasErrorCodeWithMessage(16460, " E11000 ") }

return false
}
```
Client.BulkWriteException doesn’t implement ServerError, so it can never return true here.

This is a sharp edge: a user would expect a driver-sourced error to work with this interface.

Definition of done: what must be done to consider the task complete?

One of:

1. Make ClientBulkWriteException implement ServerError
2. Rewrite this function so it works as would be expected.

The exact Go version used, with patch level:

1.26.4

The exact version of the Go driver used:

2.7.0

Describe how MongoDB is set up. Local vs Hosted, version, topology, load balanced, etc.

The operating system and version (e.g. Windows 7, OSX 10.8, ...)

Security Vulnerabilities

If you’ve identified a security vulnerability in a driver or any other MongoDB project, please report it according to the instructions here