After my previous posts I actually rescheduled my cards properly using built in anki functions instead of an add-on. However using beta 2.1.28-2 this gave an error when I tried to review the deck in which I rescheduled all the cards:

Error
An error occurred. Please start Anki while holding down the shift key, which will temporarily disable the add-ons you have installed.
If the issue only occurs when add-ons are enabled, please use the Tools > Add-ons menu item to disable some add-ons and restart Anki, repeating until you discover the add-on that is causing the problem.
When you've discovered the add-on that is causing the problem, please report the issue on the add-on support site.
Debug info:
Anki 2.1.28 (ebce044b) Python 3.8.1 Qt 5.14.1 PyQt 5.14.1
Platform: Linux
Flags: frz=True ao=True sv=2
Add-ons, last update check: 2020-06-03 17:38:27

Caught exception:
Traceback (most recent call last):
  File "aqt/webview.py", line 34, in cmd
  File "aqt/webview.py", line 117, in _onCmd
  File "aqt/webview.py", line 521, in _onBridgeCmd
  File "aqt/overview.py", line 67, in _linkHandler
  File "aqt/main.py", line 642, in moveToState
  File "aqt/main.py", line 664, in _reviewState
  File "aqt/reviewer.py", line 65, in show
  File "aqt/reviewer.py", line 110, in nextCard
  File "anki/schedv2.py", line 56, in getCard
  File "anki/schedv2.py", line 264, in _getCard
  File "anki/schedv2.py", line 311, in _getNewCard
  File "</usr/local/share/anki/bin/decorator.pyc:decorator-gen-8>", line 2, in _fillNew
  File "anki/hooks.py", line 587, in decorator_wrapper
  File "anki/hooks.py", line 584, in repl
TypeError: fillNew() got multiple values for argument '_old'