langgenius/dify · error · ValueError

deleted environment variable ids must be unique

Error message

deleted environment variable ids must be unique

What it means

Raised by SyncEnvironmentVariablePatchPayload.validate_patch when deleted_environment_variable_ids contains duplicate entries (api/controllers/console/app/workflow.py:133-134). Deleting the same id twice is meaningless and indicates a client bug; validation rejects it. Surfaced as a Pydantic ValidationError (400).

Source

Thrown at api/controllers/console/app/workflow.py:134

    description: NotRequired[str | None]


class SyncEnvironmentVariablePatchPayload(BaseModel):
    environment_variables: list[dict[str, Any]] = Field(default_factory=list)
    deleted_environment_variable_ids: list[str] = Field(default_factory=list)

    @model_validator(mode="after")
    def validate_patch(self) -> Self:
        """Require stable, disjoint IDs so the service can merge the patch deterministically."""
        upsert_ids = [variable.get("id") for variable in self.environment_variables]
        if any(not isinstance(variable_id, str) or not variable_id for variable_id in upsert_ids):
            raise ValueError("patched environment variables require an id")
        if len(set(upsert_ids)) != len(upsert_ids):
            raise ValueError("patched environment variable ids must be unique")
        if any(not variable_id for variable_id in self.deleted_environment_variable_ids):
            raise ValueError("deleted environment variable ids must not be empty")
        if len(set(self.deleted_environment_variable_ids)) != len(self.deleted_environment_variable_ids):
            raise ValueError("deleted environment variable ids must be unique")
        if set(upsert_ids).intersection(self.deleted_environment_variable_ids):
            raise ValueError("an environment variable cannot be upserted and deleted in the same patch")
        return self


class SyncDraftWorkflowPayload(BaseModel):
    model_config = ConfigDict(extra="forbid")

    graph: dict[str, Any]
    features: dict[str, Any]
    hash: str | None = None
    is_collaborative: bool = Field(default=False, alias="_is_collaborative")
    environment_variable_patch: SyncEnvironmentVariablePatchPayload | None = None
    conversation_variables: list[dict[str, Any]] = Field(
        default_factory=list,
    )

View on GitHub (pinned to ef8544b173)

Solutions

1. Deduplicate deleted_environment_variable_ids before submit: `[...new Set(ids)]`.
2. Track deletions in a Set on the client so duplicates cannot accumulate.
3. Disable the delete control after the variable is marked for deletion.

Example fix

// before: duplicate in delete list
deleted_environment_variable_ids: ['a', 'a', 'b']
// after: dedup
deleted_environment_variable_ids: [...new Set(['a', 'a', 'b'])]

// Deduplicate delete ids before submit
payload.deleted_environment_variable_ids = [...new Set(payload.deleted_environment_variable_ids)]

function uniqueDeletes(ids) {
  return new Set(ids).size === ids.length
}

When it happens

Trigger: The deleted_environment_variable_ids array has the same id more than once. Common with double-add handlers or merging multiple delete selections without dedup.

Common situations: UI delete-action fired twice for the same variable; merging selected-for-delete sets without dedup; test payload reused; event handler firing on both click and keypress.

Related errors

• patched environment variable ids must be unique
• patched environment variables require an id
• deleted environment variable ids must not be empty
• an environment variable cannot be upserted and deleted in th
• Unsupported environment variable value type: {value_type}

AI-assisted analysis of langgenius/dify@ef8544b173 (2026-08-12). Data as JSON: /api/errors/4b7a838e0f428e65. Report an issue: GitHub.