Unable to edit speed effort curve

[SharglutDev]

What happened?

In the rolling stock editor, when adding a new electric profile or a new power restriction code on a duplicated rolling stock, it "breaks" the whole related traction mode. This leads to the impossibility to edit any speed effort curve of any electrical profile / power restriction of the traction mode.
This issue doesn't happen on a rolling stock created from scratch.

What did you expect to happen?

Adding a new electrical profile or power restriction code shouldn't break anything.

How can we reproduce it (as minimally and precisely as possible)?

1. Go to rolling stock editor
2. Select a rollling stock with power restrictions (a tgv for example), edit it and go to speed effort curve tab
3. Check that you can edit any curve
4. Now add a power restriction code in any traction mode / electrical profile and try to edit any curve

What operating system, browser and environment are you using?

• Browser: Firefox
• OS: Ubuntu
• Env: Dev

OSRD version (top right corner Account button > Informations)

dev 5895b87