In the Odoo 17 certification exam, to skip a question without losing points, you should:

• Leave the question unanswered.

If there is no option to leave the question unanswered, you can select the "I don't know" answer.

Scoring Reference:

• Correct Answer : +1 point
• Wrong Answer : -0.5 points
• Unanswered Question : 0 points

For more details, you can refer to the official certification information here