chroma-core/chroma · error · ValueError

Token {token} already in use: wanted to use it for user {use

Error message

Token {token} already in use: wanted to use it for user {user['id']} but it's already in use by user {self._token_user_mapping[token]}

What it means

Error "Token {token} already in use: wanted to use it for user {user['id']} but it's already in use by user {self._token_user_mapping[token]}" thrown in chroma-core/chroma.

Source

Thrown at chromadb/auth/token_authn/__init__.py:183

                tokens=[creds[0]],
            )
            return

        self._users = cast(List[User], yaml.safe_load("\n".join(creds))["users"])
        for user in self._users:
            if "tokens" not in user:
                raise ValueError("User missing tokens")
            if "tenant" not in user:
                user["tenant"] = "*"
            if "databases" not in user:
                user["databases"] = ["*"]
            for token in user["tokens"]:
                _check_token(token)
                if (
                    token in self._token_user_mapping
                    and self._token_user_mapping[token] != user
                ):
                    raise ValueError(
                        f"Token {token} already in use: wanted to use it for "
                        f"user {user['id']} but it's already in use by "
                        f"user {self._token_user_mapping[token]}"
                    )
                self._token_user_mapping[token] = user

    @trace_method(
        "TokenAuthenticationServerProvider.authenticate", OpenTelemetryGranularity.ALL
    )
    @override
    def authenticate_or_raise(self, headers: Dict[str, str]) -> UserIdentity:
        try:
            if self._token_transport_header.value.lower() not in headers.keys():
                raise AuthError(
                    f"Authorization header '{self._token_transport_header.value}' not found"
                )
            token = headers[self._token_transport_header.value.lower()]
            if self._token_transport_header == TokenTransportHeader.AUTHORIZATION:

View on GitHub (pinned to aecdd12c8a)

When it happens

Trigger: Thrown at chromadb/auth/token_authn/__init__.py:183 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of chroma-core/chroma@aecdd12c8a (2026-08-16). Data as JSON: /api/errors/6373aca30f6f5b49. Report an issue: GitHub.