event error when deleting a variable

[clavay]

When deleting a variable :

[19/Jun/2024 14:29:55] ERROR [pyscada.utils.scheduler:927] pyscada.event, unhandled exception
Traceback (most recent call last):
  File "/home/pyscada/.venv/lib/python3.9/site-packages/django/db/models/fields/related_descriptors.py", line 218, in __get__
    rel_obj = self.field.get_cached_value(instance)
  File "/home/pyscada/.venv/lib/python3.9/site-packages/django/db/models/fields/mixins.py", line 15, in get_cached_value
    return instance._state.fields_cache[cache_name]
KeyError: 'variable'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/pyscada/.venv/lib/python3.9/site-packages/pyscada/utils/scheduler.py", line 818, in run
    status, data = self.loop()
  File "/home/pyscada/.venv/lib/python3.9/site-packages/pyscada/event/worker.py", line 24, in loop
    item.do_event_check()
  File "/home/pyscada/.venv/lib/python3.9/site-packages/pyscada/models.py", line 3039, in do_event_check
    (is_valid, var_list, vp_list) = item.is_valid()
  File "/home/pyscada/.venv/lib/python3.9/site-packages/pyscada/models.py", line 3370, in is_valid
    (in_limit, item_info) = item.in_limit()
  File "/home/pyscada/.venv/lib/python3.9/site-packages/pyscada/models.py", line 3491, in in_limit
    if self.variable is not None and self.variable.active:
  File "/home/pyscada/.venv/lib/python3.9/site-packages/django/db/models/fields/related_descriptors.py", line 236, in __get__
    rel_obj = self.get_object(instance)
  File "/home/pyscada/.venv/lib/python3.9/site-packages/django/db/models/fields/related_descriptors.py", line 199, in get_object
    return qs.get(self.field.get_reverse_related_filter(instance))
  File "/home/pyscada/.venv/lib/python3.9/site-packages/django/db/models/query.py", line 637, in get
    raise self.model.DoesNotExist(
pyscada.models.Variable.DoesNotExist: Variable matching query does not exist.

[19/Jun/2024 14:29:56] DEBUG [pyscada.utils.scheduler:1049] Process pyscada.event(4152810) is stopped
[19/Jun/2024 14:30:09] DEBUG [pyscada.utils.scheduler:533] process pyscada.event started