OtterMind/Chat2DB · error · BusinessException

mysql.account.previewTokenMismatch

mysql.account.previewTokenMismatch

Error message

mysql.account.previewTokenMismatch

What it means

Error "mysql.account.previewTokenMismatch" thrown in OtterMind/Chat2DB.

Source

Thrown at chat2db-community-server/chat2db-community-plugins/chat2db-community-mysql/src/main/java/ai/chat2db/plugin/mysql/account/MysqlAccountManager.java:79

            throw new BusinessException(ERROR_KEY_ACCOUNT_GRANTS_UNAVAILABLE, null, e);
        }
    }

    @Override
    public AccountPreview preview(AccountOperationRequest command) {
        String sql = MysqlAccountSqlBuilder.buildSql(command);
        AccountPreview preview = new AccountPreview();
        preview.setActionType(command.getActionType());
        preview.setSql(MysqlAccountSqlBuilder.buildDisplaySql(command));
        preview.setPreviewToken(MysqlAccountSqlBuilder.previewToken(sql));
        return preview;
    }

    @Override
    public AccountExecuteResponse execute(Connection connection, AccountOperationRequest command) {
        AccountPreview preview = preview(command);
        if (!StringUtils.equals(preview.getPreviewToken(), command.getPreviewToken())) {
            throw new BusinessException(ERROR_KEY_ACCOUNT_PREVIEW_TOKEN_MISMATCH);
        }

        AccountExecuteResponse result = new AccountExecuteResponse();
        result.setActionType(preview.getActionType());
        result.setSql(preview.getSql());
        String executionSql = MysqlAccountSqlBuilder.buildSql(command);

        try (PreparedStatement statement = connection.prepareStatement(executionSql)) {
            statement.execute();
            result.setSuccess(Boolean.TRUE);
            result.setMessage(MESSAGE_OK);
        } catch (SQLException e) {
            result.setSuccess(Boolean.FALSE);
            result.setMessage(e.getMessage());
            result.setFailureCode(ERROR_KEY_ACCOUNT_EXECUTE_FAILED);
            result.setErrorCode(e.getErrorCode());
            result.setSqlState(e.getSQLState());
        }

View on GitHub (pinned to 5ee1e990e7)

Solutions

1. Re-run the preview step to obtain a fresh token, then submit the apply request with that exact token.
2. Do not modify account parameters between preview and apply.

When it happens

Trigger: The apply call's preview token did not match the parameters previously previewed, indicating stale or tampered state.

Common situations: See trigger scenarios.

AI-assisted analysis of OtterMind/Chat2DB@5ee1e990e7 (2026-08-14). Data as JSON: /api/errors/3fe553a37d86585b. Report an issue: GitHub.