Steps to reproduce
Use LimeSurvey version 6.15.4+250710 with Microsoft SQL Server (ODBC Driver 17).

Create a survey with at least one multiple-choice or array question (with answer options).

Go to the survey administration menu and click "Print survey".

The application tries to render the survey content and fails.

Expected result
The survey should render the printable view successfully, showing all questions and their answer options.

Actual result
The server returns a 500 Internal Server Error. The following database error appears:

CDbCommand failed to execute the SQL statement: SQLSTATE[42000]:
[Microsoft][ODBC Driver 17 for SQL Server][SQL Server]A column has been specified more than once in the ORDER BY list.
Columns in the ORDER BY list must be unique.
Root cause:
The PrintableSurvey.php controller explicitly sets the order => 'sortorder,code' in a query to Answer::model()->findAll(), but this same order is already included in the model's defaultScope(). This results in a duplicated ORDER BY clause like:

ORDER BY sortorder, code, sortorder, code
SQL Server does not allow repeated fields in the ORDER BY clause, unlike MySQL or PostgreSQL.

Workaround tested:
Editing PrintableSurvey.php line 1270 and adding a space after the comma ('sortorder, code') prevents duplication. Alternatively, removing the 'order' key entirely also resolves the error.