I have tried to remove whole topic and wrote script again, but now other properties in quest behave same
I dont want to remove all quest and write it again
Have you any ideas what to do with that?
Could it be that the new fragment was added to your over-write folder in Mod Organizer and not moved to your mod directory?
I had a similar issue at some point and I believe that was the fix for me.
Another possibility is that you have multiple versions of the script (maybe one in your skyrim data dir and another in your mod dir) and the old one is getting loaded over the new.