mem0ai/mem0 · error · ValueError

Extra fields not allowed: {', '.join(extra_fields)}. Please

Error message

Extra fields not allowed: {', '.join(extra_fields)}. Please input only the following fields: {', '.join(allowed_fields)}

What it means

Error "Extra fields not allowed: {', '.join(extra_fields)}. Please input only the following fields: {', '.join(allowed_fields)}" thrown in mem0ai/mem0.

Source

Thrown at mem0/configs/vector_stores/milvus.py:37

    JACCARD = "JACCARD"


class MilvusDBConfig(BaseModel):
    url: str = Field("http://localhost:19530", description="Full URL for Milvus/Zilliz server")
    token: str = Field(None, description="Token for Zilliz server / local setup defaults to None.")
    collection_name: str = Field("mem0", description="Name of the collection")
    embedding_model_dims: int = Field(1536, description="Dimensions of the embedding model")
    metric_type: str = Field("L2", description="Metric type for similarity search")
    db_name: str = Field("", description="Name of the database")

    @model_validator(mode="before")
    @classmethod
    def validate_extra_fields(cls, values: Dict[str, Any]) -> Dict[str, Any]:
        allowed_fields = set(cls.model_fields.keys())
        input_fields = set(values.keys())
        extra_fields = input_fields - allowed_fields
        if extra_fields:
            raise ValueError(
                f"Extra fields not allowed: {', '.join(extra_fields)}. Please input only the following fields: {', '.join(allowed_fields)}"
            )
        return values

    model_config = ConfigDict(arbitrary_types_allowed=True)

View on GitHub (pinned to 001c235229)

Solutions

1. Remove the extra config fields listed and keep only the allowed Milvus fields (url, token, collection_name, etc.).

When it happens

Trigger: Thrown at mem0/configs/vector_stores/milvus.py:37 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of mem0ai/mem0@001c235229 (2026-08-15). Data as JSON: /api/errors/ec27de363f1385ce. Report an issue: GitHub.