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
for key1, key2 in RENAMED_ATTRS:
            if key1 in attrs:
                _logger.warning("Field %s: parameter %r is no longer supported; use %r instead.",
                                self, key1, key2)
        
        if not (self.store and self.column_type) or self.manual or self.deprecated:
            self.prefetch = False
        if not self.string and not self.related:
            
            self.string = name.replace('_', ' ').capitalize()
        
        if self.default is not None:
            value = self.default
            self.default = value if callable(value) else lambda model: value
    
    #
    
    #
    def setup_full(self, model):
        """ Full setup: everything else, except recomputation triggers. """
        if self._setup_done != 'full':
            if not self.related:
                self._setup_regular_full(model)
            else:
                self._setup_related_full(model)
            self._setup_done = 'full'
    #
    
    #
    def _setup_regular_base(self, model):