When I try to restore database backup to another server (digital ocean to test server on aws), showing an error like this, I tried to change odoo base to same as of the live server.

Traceback (most recent call last): File "/odoo14/odoo14-server/odoo/api.py", line 792, in get field_cache = field_cache[record.env.cache_key(field)] KeyError: (None,)

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "/odoo14/odoo14-server/odoo/fields.py", line 972, in get value = env.cache.get(record,\ self) \ \ File\ "/odoo14/odoo14-server/odoo/api.py",\ line\ 796,\ in\ get \ \ \ \ raise\ CacheMiss(record,\ field) odoo.exceptions.CacheMiss:\ 'res.users(20,).image_128'

During\ handling\ of\ the\ above\ exception,\ another\ exception\ occurred:

Traceback\ (most\ recent\ call\ last): \ \ File\ "/odoo14/odoo14-server/odoo/api.py",\ line\ 792,\ in\ get \ \ \ \ field_cache\ =\ field_cache[record.env.cache_key(field)] KeyError:\ (None,)

During\ handling\ of\ the\ above\ exception,\ another\ exception\ occurred:

Traceback\ (most\ recent\ call\ last): \ \ File\ "/odoo14/odoo14-server/odoo/fields.py",\ line\ 972,\ in\ get \ \ \ \ value\ =\ env.cache.get(record,\ self) \ \ File\ "/odoo14/odoo14-server/odoo/api.py",\ line\ 796,\ in\ get \ \ \ \ raise\ CacheMiss(record,\ field) odoo.exceptions.CacheMiss:\ 'res.partner(12809,).image_128'

During\ handling\ of\ the\ above\ exception,\ another\ exception\ occurred:

Traceback\ (most\ recent\ call\ last): \ \ File\ "/odoo14/odoo14-server/odoo/api.py",\ line\ 792,\ in\ get \ \ \ \ field_cache\ =\ field_cache[record.env.cache_key(field)] KeyError:\ (None,\ None)

During\ handling\ of\ the\ above\ exception,\ another\ exception\ occurred:

Traceback\ (most\ recent\ call\ last): \ \ File\ "/odoo14/odoo14-server/odoo/fields.py",\ line\ 972,\ in\ get \ \ \ \ value\ =\ env.cache.get(record,\ self) \ \ File\ "/odoo14/odoo14-server/odoo/api.py",\ line\ 796,\ in\ get \ \ \ \ raise\ CacheMiss(record,\ field) odoo.exceptions.CacheMiss:\ 'ir.attachment(321,).datas'

During\ handling\ of\ the\ above\ exception,\ another\ exception\ occurred:

Traceback\ (most\ recent\ call\ last): \ \ File\ "/odoo14/odoo14-server/odoo/api.py",\ line\ 792,\ in\ get \ \ \ \ field_cache\ =\ field_cache[record.env.cache_key(field)] KeyError:\ (None,)

During\ handling\ of\ the\ above\ exception,\ another\ exception\ occurred:

Traceback\ (most\ recent\ call\ last): \ \ File\ "/odoo14/odoo14-server/odoo/fields.py",\ line\ 972,\ in\ get \ \ \ \ value\ =\ env.cache.get(record,\ self) \ \ File\ "/odoo14/odoo14-server/odoo/api.py",\ line\ 796,\ in\ get \ \ \ \ raise\ CacheMiss(record,\ field) odoo.exceptions.CacheMiss: 'ir.attachment(321,).raw'

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "/odoo14/odoo14-server/odoo/addons/base/models/ir_attachment.py", line 105, in _file_read with open(full_path, 'rb') as f: FileNotFoundError: [Errno 2] No such file or directory: '/odoo14/.local/share/Odoo/filestore/APL_2.0/c5/c54d3d5e2b1320083bf5378b7c195b0985fa04c1'

I find that s a problem on utf8 encoding .

i change db on utf8 and it work

Thank for all :)

Please make sure following parameters are correctly set:

How big is your database?

In my case, it seems that the server specification is to low.  I experienced this "Database restore error" in virtual server with spec of 1 CPU and 1 Gb RAM.  After I increased the spec with 2 CPUs and 2 Gb RAM, I succeeded in restoring the backup database.

Assuming you are trying to restore the database saved with the same version of Odoo, if you are under linux check the permission of the zip. Assign complete read/write for Odoo user should do the trick.