[FIX] base: do not unlink() to remove ir.property records (#21269)

Unlinking such a record causes a cache invalidation, that drops the values of
other company-dependent fields to set.  This may cause other company-dependent
fields to be set to their former value.

OPW 782080

odoo/addons/base/res/ir_property.py

@@ -212,7 +212,11 @@ class Property(models.Model):
             id = refs.pop(prop.res_id)
             value = clean(values[id])
             if value == default_value:
-                prop.unlink()
+                # avoid prop.unlink(), as it clears the record cache that can
+                # contain the value of other properties to set on record!
+                prop.check_access_rights('unlink')
+                prop.check_access_rule('unlink')
+                self._cr.execute("DELETE FROM ir_property WHERE id=%s", [prop.id])
             elif value != clean(prop.get_by_record()):
                 prop.write({'value': value})