[FIX] account: set payment sequence correctly

Before the fix, the compute function is set as a string in the `default`
parameter. Meaning that it will always be True because a non empty
string is truthy.
Fix by converting the field to be compute-editable, like the function
was designed to be.

closes odoo/odoo#114904

X-original-commit: 11121120b13fc7500ee720f10964de6b9a0373af
Signed-off-by: Laurent Smet <las@odoo.com>
Signed-off-by: William André (wan) <wan@odoo.com>

addons/account/models/account_journal.py

@@ -115,7 +115,11 @@ class AccountJournal(models.Model):
     country_code = fields.Char(related='company_id.account_fiscal_country_id.code', readonly=True)
 
     refund_sequence = fields.Boolean(string='Dedicated Credit Note Sequence', help="Check this box if you don't want to share the same sequence for invoices and credit notes made from this journal", default=False)
-    payment_sequence = fields.Boolean(string='Dedicated Payment Sequence', help="Check this box if you don't want to share the same sequence on payments and bank transactions posted on this journal", default='_compute_payment_sequence')
+    payment_sequence = fields.Boolean(
+        string='Dedicated Payment Sequence',
+        compute='_compute_payment_sequence', readonly=False, store=True, precompute=True,
+        help="Check this box if you don't want to share the same sequence on payments and bank transactions posted on this journal",
+    )
     sequence_override_regex = fields.Text(help="Technical field used to enforce complex sequence composition that the system would normally misunderstand.\n"\
                                           "This is a regex that can include all the following capture groups: prefix1, year, prefix2, month, prefix3, seq, suffix.\n"\
                                           "The prefix* groups are the separators between the year, month and the actual increasing sequence number (seq).\n"\