[BUG] 'FSRS' object has no attribute 'fuzz_factor'

[user1823]

To Reproduce
Steps to reproduce the behavior:

1. Undo reschedulings in all cards (or use a collection in which cards don't have custom data)
2. Reschedule all cards
3. See error

Error message

Caught exception:
Traceback (most recent call last):
File "aqt.taskman", line 122, in _on_closures_pending
File "aqt.taskman", line 71, in
File "C:\Users\User\AppData\Roaming\Anki2\addons21\759844606\schedule\reschedule.py", line 256, in on_done
tooltip(f"{future.result()} in {time.time() - start_time:.2f} seconds")
File "concurrent.futures._base", line 439, in result
File "concurrent.futures._base", line 391, in __get_result
File "concurrent.futures.thread", line 58, in run
File "C:\Users\User\AppData\Roaming\Anki2\addons21\759844606\schedule\reschedule.py", line 277, in
lambda: reschedule_background(did, recent, filter_flag, filtered_cids),
File "C:\Users\User\AppData\Roaming\Anki2\addons21\759844606\schedule\reschedule.py", line 354, in reschedule_background
card = reschedule_card(cid, fsrs, rollover, cur_deck_param)
File "C:\Users\User\AppData\Roaming\Anki2\addons21\759844606\schedule\reschedule.py", line 503, in reschedule_card
again_ivl = fsrs.next_interval(again_s, retention, max_ivl)
File "C:\Users\User\AppData\Roaming\Anki2\addons21\759844606\schedule\reschedule.py", line 225, in next_interval
new_interval = self.apply_fuzz(9 * stability * (1 / retention - 1))
File "C:\Users\User\AppData\Roaming\Anki2\addons21\759844606\schedule\reschedule.py", line 217, in apply_fuzz
return int(self.fuzz_factor * (max_ivl - min_ivl + 1) + min_ivl)
AttributeError: 'FSRS' object has no attribute 'fuzz_factor'

Environment

• Anki version: 2.1.66
• OS: Windows 11
• Add-on version: Latest

[L-M-Sherlock]

Patch: fsrs4anki-helper.zip

Could you help me test it?