I was working on the system and adding few invoices and payments, then suddenly I was not able to access the accounting main page at all and getting error:

RPC_ERROR
Odoo Server Error
Traceback (most recent call last):
File "/home/odoo/src/odoo/16.0/odoo/api.py", line 983, in get
cache_value = field_cache[record._ids[0]]
KeyError: 1

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/odoo/src/odoo/16.0/odoo/fields.py", line 1138, in __get__
value = env.cache.get(record, self)
File "/home/odoo/src/odoo/16.0/odoo/api.py", line 990, in get
raise CacheMiss(record, field)
odoo.exceptions.CacheMiss: 'account.journal(1,).kanban_dashboard'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "/home/odoo/src/odoo/16.0/odoo/http.py", line 1578, in _serve_db
return service_model.retrying(self._serve_ir_http, self.env)
File "/home/odoo/src/odoo/16.0/odoo/service/model.py", line 134, in retrying
result = func()
File "/home/odoo/src/odoo/16.0/odoo/http.py", line 1607, in _serve_ir_http
response = self.dispatcher.dispatch(rule.endpoint, args)
File "/home/odoo/src/odoo/16.0/odoo/http.py", line 1804, in dispatch
result = self.request.registry['ir.http']._dispatch(endpoint)
File "/home/odoo/src/odoo/16.0/odoo/addons/base/models/ir_http.py", line 140, in _dispatch
result = endpoint(**request.params)
File "/home/odoo/src/odoo/16.0/odoo/http.py", line 698, in route_wrapper
result = endpoint(self, *args, **params_ok)
File "/home/odoo/src/odoo/16.0/addons/web/controllers/dataset.py", line 42, in call_kw
return self._call_kw(model, method, args, kwargs)
File "/home/odoo/src/odoo/16.0/addons/web/controllers/dataset.py", line 33, in _call_kw
return call_kw(request.env[model], method, args, kwargs)
File "/home/odoo/src/odoo/16.0/odoo/api.py", line 457, in call_kw
result = _call_kw_model(method, model, args, kwargs)
File "/home/odoo/src/odoo/16.0/odoo/api.py", line 430, in _call_kw_model
result = method(recs, *args, **kwargs)
File "/home/odoo/src/odoo/16.0/addons/web/models/models.py", line 62, in web_search_read
records = self.search_read(domain, fields, offset=offset, limit=limit, order=order)
File "/home/odoo/src/odoo/16.0/odoo/models.py", line 4959, in search_read
result = records.read(fields, **read_kwargs)
File "/home/odoo/src/odoo/16.0/odoo/models.py", line 2994, in read
return self._read_format(fnames=fields, load=load)
File "/home/odoo/src/odoo/16.0/odoo/models.py", line 3132, in _read_format
vals[name] = convert(record[name], record, use_name_get)
File "/home/odoo/src/odoo/16.0/odoo/models.py", line 5842, in __getitem__
return self._fields[key].__get__(self, type(self))
File "/home/odoo/src/odoo/16.0/odoo/fields.py", line 1187, in __get__
self.compute_value(recs)
File "/home/odoo/src/odoo/16.0/odoo/fields.py", line 1346, in compute_value
records._compute_field_value(self)
File "/home/odoo/src/odoo/16.0/addons/mail/models/mail_thread.py", line 403, in _compute_field_value
return super()._compute_field_value(field)
File "/home/odoo/src/odoo/16.0/odoo/models.py", line 4187, in _compute_field_value
getattr(self, field.compute)()
File "/home/odoo/src/odoo/16.0/addons/account/models/account_journal_dashboard.py", line 21, in _kanban_dashboard
journal.kanban_dashboard = json.dumps(journal.get_journal_dashboard_datas())
File "/home/odoo/src/odoo/16.0/addons/account/models/account_journal_dashboard.py", line 279, in get_journal_dashboard_datas
self._cr.execute('''
File "/home/odoo/src/odoo/16.0/odoo/sql_db.py", line 315, in execute
res = self._obj.execute(query, params)
psycopg2.errors.UndefinedFunction: operator does not exist: integer = boolean
LINE 10: AND aml.account_id = false
^
HINT: No operator matches the given name and argument types. You might need to add explicit type casts.


The above server error caused the following client error:
OwlError: An error occured in the owl lifecycle (see this Error's "cause" property)
at handleError (https://digitalmass.odoo.com/web/assets/652-ec0c356/web.assets_common.min.js:1212:101)
at owl.App.handleError (https://digitalmass.odoo.com/web/assets/652-ec0c356/web.assets_common.min.js:2038:29)
at ComponentNode.initiateRender (https://digitalmass.odoo.com/web/assets/652-ec0c356/web.assets_common.min.js:1518:19)

Caused by: RPC_ERROR: Odoo Server Error
at makeErrorFromResponse (https://digitalmass.odoo.com/web/assets/653-f453319/web.assets_backend.min.js:964:163)
at XMLHttpRequest. (https://digitalmass.odoo.com/web/assets/653-f453319/web.assets_backend.min.js:971:13)

Do you have any idea how to solve this?