Adjust to RegistryObject classvar name change

aleksis/apps/untis/data_checks.py

@@ -12,7 +12,7 @@ class CourseGroupNotFoundAndCreated(DataCheck):
         "The Untis import created a new course group because no matching group has been found."
     )
 
-    solve_options = {IgnoreSolveOption.name: IgnoreSolveOption}
+    solve_options = {IgnoreSolveOption._class_name: IgnoreSolveOption}
 
     @classmethod
     def run_check_data(cls):
@@ -29,7 +29,7 @@ class CourseGroupNotFoundAndNotCreated(DataCheck):
         "for a lesson because no matching group has been found."
     )
 
-    solve_options = {IgnoreSolveOption.name: IgnoreSolveOption}
+    solve_options = {IgnoreSolveOption._class_name: IgnoreSolveOption}
 
     @classmethod
     def run_check_data(cls):