invenio 2.0 (Invalid utf8 character string)

[Atisom]

Dear Invenio Team,

When I tried to install invenio 2.0 on Ubuntu 14.04, I got this warning:
(I used maint-2.0 branch)

(invenio) ubuntu@invenio2-ubuntu-2:~/.virtualenvs/invenio$ inveniomanage database create
>>> Going to create tables...
Test connection...       [OK]
Test UTF-8 support...    [OK]
 >>> Creating 544 tables ... [################################        ] 80% 0:00:09.257739 >>> Modifing table structure...
 >>> Creating 544 tables ... [########################################] 100% 0:00:00 >>> Everything has been created successfully.
 >>> Creating 2 storage engines ... [########################################] 100% 0:00:00 >>> Everything has been created successfully.
>>> There are 49 tables to be loaded.
>>> Going to reset CFG_SITE_ADMIN_EMAIL...
You may want to restart Apache now.
>>> CFG_SITE_ADMIN_EMAIL reset successfully.
Added default demo site settings.
Compiled firewall like role definitions.
2018-02-13 13:16:02 --> Task #1 submitted.
2018-02-13 13:16:05 --> Task #1 started.
2018-02-13 13:16:28 --> Atlantis Institute of Fictive Science / reclist cache update
2018-02-13 13:16:28 --> /home/ubuntu/.virtualenvs/invenio/src/invenio/invenio/legacy/dbquery_mysql.py:268: Warning: Invalid utf8 character string: '9C6360'
  rc = cur.execute(sql, param)

2018-02-13 13:16:28 --> /home/ubuntu/.virtualenvs/invenio/src/invenio/invenio/legacy/dbquery_mysql.py:268: Warning: Invalid utf8 character string: '9C6360'
  rc = cur.execute(sql, param)

What cause this warning? How can I fix it?

Thanks,
Attila

[lnielsen]

I'm not sure the cause of the error, however, we do not recommend installing Invenio v2 (the code base is not suitable for production systems, and will not receive any further development nor security fixes). Go either with Invenio v1 (software system) or bleeding edge on v3 (a framework of components and very different from v1 and v2).