# panic: proto: file "common.proto" is already registered

- **ID:** `go/grpc-protobuf-import-error`
- **Domain:** go
- **Category:** build_error
- **Verification:** ai_generated
- **Fix Rate:** 80%

## Root Cause

The same .proto file is being imported and registered multiple times, often due to circular imports or duplicate imports.

## Version Compatibility

| Version | Status | Introduced | Deprecated |
|---------|--------|------------|------------|
| 1.30.0 | active | — | — |

## Workarounds

1. **** (90% success)
   ```
   Ensure each .proto file is imported only once in the dependency graph; use go module to manage dependencies.
   ```
2. **** (85% success)
   ```
   Use protoc with --go_opt=paths=source_relative to avoid duplicate registration.
   ```

## Dead Ends

- **** —  (70% fail)
- **** —  (60% fail)