Completing exercise on my own still unlocks side exercises.

Basically #4223 .

I had the same issue a couple month ago and submitted a ticket here (#4223) but thought it was fixed. Now I noticed the same problem on a different track (last time go this time python).

What happened ?

I completed the exercise twelve days in the python track on my own. I go the warning screen that I will not unlock the side exercises, etc. But in the end the single side exercise is still unlocked for me. And it's not just displayed this way instead I can actually work on it.

Screenshots :

Reproduce the behavior in the Python track by completing exercise twelve on your own and checking whether the side exercise can still be opened. Compare the result with issue #4223; done means independently completed exercises do not unlock side exercises.

Written by the indexing model from the issue text.