Failed to Edit Periodic Smart Test Long schedule in WebUI

When I tried edit the Periodic S.M.A.R.T. Tests (LONG) schedule, it failed with the following error, no matter what schedule I have chosen:

# errorVALIDATION

[EINVAL] smart_test_update.data.schedule: A SHORT test already runs at Day 9th of every month, 00:00
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/middlewared/main.py", line 211, in call_method
    result = await self.middleware.call_with_audit(message['method'], serviceobj, methodobj, params, self)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/middlewared/main.py", line 1529, in call_with_audit
    result = await self._call(method, serviceobj, methodobj, params, app=app,
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/middlewared/main.py", line 1460, in _call
    return await methodobj(*prepared_call.args)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/middlewared/service/crud_service.py", line 240, in update
    return await self.middleware._call(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/middlewared/main.py", line 1460, in _call
    return await methodobj(*prepared_call.args)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/middlewared/service/crud_service.py", line 261, in nf
    rv = await func(*args, **kwargs)
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/middlewared/schema/processor.py", line 179, in nf
    return await func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/middlewared/schema/processor.py", line 49, in nf
    res = await f(*args, **kwargs)
          ^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/lib/python3/dist-packages/middlewared/plugins/smart.py", line 423, in do_update
    verrors.check()
  File "/usr/lib/python3/dist-packages/middlewared/service_exception.py", line 72, in check
    raise self
middlewared.service_exception.ValidationErrors: [EINVAL] smart_test_update.data.schedule: A SHORT test already runs at Day 9th of every month, 00:00

I have got the same issue. For my sdb hard drive i created an shedule "Custom (000) at 12 AM, only on Sunday" for a SHORT Smart test. That works. But when I create another shedule for Monthly (001) for a LONG test, when saving it displays:

Traceback (most recent call last):
File “/usr/lib/python3/dist-packages/middlewared/main.py”, line 211, in call_method
result = await self.middleware.call_with_audit(message[‘method’], serviceobj, methodobj, params, self)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/lib/python3/dist-packages/middlewared/main.py”, line 1529, in call_with_audit
result = await self._call(method, serviceobj, methodobj, params, app=app,
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/lib/python3/dist-packages/middlewared/main.py”, line 1460, in _call
return await methodobj(*prepared_call.args)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/lib/python3/dist-packages/middlewared/service/crud_service.py”, line 230, in create
return await self.middleware._call(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/lib/python3/dist-packages/middlewared/main.py”, line 1460, in _call
return await methodobj(*prepared_call.args)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/lib/python3/dist-packages/middlewared/service/crud_service.py”, line 261, in nf
rv = await func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/lib/python3/dist-packages/middlewared/schema/processor.py”, line 49, in nf
res = await f(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/lib/python3/dist-packages/middlewared/schema/processor.py”, line 179, in nf
return await func(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/lib/python3/dist-packages/middlewared/plugins/smart.py”, line 396, in do_create
verrors.check()
File “/usr/lib/python3/dist-packages/middlewared/service_exception.py”, line 72, in check
raise self
middlewared.service_exception.ValidationErrors: [EINVAL] smart_test_create.data.schedule: A SHORT test already runs at Day 1st of every month, Sun, 00:00

This also happens, with other message, when I chose other shedules or create a custum shedule on hours, when no other shedules will run.