Avoid collision with reserved name

aleksis/apps/chronos/models.py

@@ -1578,7 +1578,7 @@ class LessonEvent(CalendarEvent):
             not_amending = params.get("not_amending", False)
             amending = params.get("amending", False)
             own = params.get("own", False)
-            all = params.get("all", False)
+            return_all = params.get("all", False)
 
             if prefetch_absences:
                 objs = objs.prefetch_related("teachers__kolego_absences")
@@ -1612,7 +1612,7 @@ class LessonEvent(CalendarEvent):
                 elif type_ == "OWNER":
                     return objs.for_owner(obj_id)
 
-            if "own" in params or all:
+            if "own" in params or return_all:
                 return objs
         if request:
             return objs.for_person(request.user.person)