BUG: Updating imported non default innovation flows details cannot be performed

[Comoque1]

Describe the bug A clear and concise description of what the bug is.

To Reproduce Steps to reproduce the behavior:

1. Go to https://acc-alkem.io/evgeniadminsspace/challenges/packsub

2. Or

3. Create custom innovation flow in a space

4. Set it as default for subspace creation

5. Create a subspace

6. On the subspace open "Innovation flow settings"

7. Click on "pen" icon to edit the innovation flow template

8. Make a change and save it: nothing happens

Expected behavior Changes can be applied.