# ONNX028: function-duplicate-inputs

**Code:** `ONNX028`

**Name:** `function-duplicate-inputs`

**Severity:** error

**Category:** spec

**Target:** function

**Fixable:** No

## Message

Function has duplicate input names.

## Suggestion

Rename function inputs to ensure uniqueness.

## Details

Function input names must be unique. Duplicate input names create
ambiguity in value resolution.