A teacher created a Homework with 0 to 10 initial grade range. After this the teacher change the range to 0 to 15. But now, we tried to assign 12 points, but the system advises that only 0 to 10 is allowed.
This happens because the grade is only set in the assignment. No tasks were generated with these settings.
You can put there even 0 to 99 - the grade limits will not be changed in the already generated tasks.