What happened?

What did you expect to happen?

All added lines can be deleted

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

1. Click on Add a train
2. Open Itinerary modal
3. Add empty lines
4. Try to delete them
5. Add an OP in one line
6. 4. Try to delete it

On which environments the bug occurs?

Dev (SNCF), Recette (SNCF)

On which browser the bug occurs?

Firefox

OSRD version (top right corner Account button > Informations)

8b88601