1. `copy_cache` in `models.py` recursively copies the caches to environment, 
2. which in
```python
def _compute_related(self, records):
        """ Compute the related field ``self`` on ``records``. """
        others = records.sudo() if self.related_sudo else records
        if records.env != others.env:
            copy_cache(records - records.filtered('id'), others.env)
        values = list(others)
        for name in self.related[:-1]:
            values = [first(value[name]) for value in values]
        for record, value in zip(records, values):
            record[self.name] = value[self.related_field.name]
```
3. copies failing cache values that have been produce previously by this line:

`models.py : def _prefetch_field()`
```python

        try:
            # THIS ONE
            result = records.read([f.name for f in fs], load='_classic_write')
        except AccessError:
            # not all records may be accessible, try with only current record
            result = self.read([f.name for f in fs], load='_classic_write')
```
I checked it's exactly the same `FailedValue` object, which is later accessed without intent (not refreshed) by the fact that the buggy environment is copied to sudo (and not refreshed).


odoo/fields.py
""" Special case for field 'id'. """
    type = 'integer'
    column_type = ('int4', 'int4')
    _slots = {
        'string': 'ID',
        'store': True,
        'readonly': True,
    }
    def __get__(self, record, owner):
        if record is None:
            return self         
        if not record:
            return False
        return record.ensure_one()._ids[0]
    def __set__(self, record, value):
        raise TypeError("field 'id' cannot be assigned")
from odoo import SUPERUSER_ID
from .exceptions import AccessError, MissingError, UserError
from .models import check_pg_name, BaseModel, IdType