Disable changes on Collection

[SavanFlou]

So I tried to disable the schedule job, to desactivate the search for information into the "Collection" parameters... but all the information keeps being changed.
I also tried to
- unlock the information.
- change the information.
- relock the information.
but information can still be changed.
To be complete,
I changed for some titles, synopsis and added people, title and synopsis have be changed, but people are still there. I did not try other changes.

It seems if I change something for movies, the changes can be locked but that does not work for collections.