SQL error when creating Array (Texts) question in LimeSurvey

I'm really sorry to report another problem with LimeSurvey, this time for tpo/ux/research#8 (closed).

When creating a question of type Array (Texts), I get the following error message and I'm unable to save the question.

To reproduce:

1. Visit https://survey.torproject.org/index.php/questionAdministration/view?surveyid=168241&gid=100&qid=1483.

2. Click Edit

3. Click on the + button at the end of the list of groups on the Y-scale.

   

4. Click Save.

Deleting a group works fine. It's adding a new group that triggers the error.

Fortunately, I was able to create this question fine by importing the survey from another instance, so it's not a strict blocker for tpo/ux/research#8 (closed). Just quite impractical.