MyBB Community Forums

Hi,
when I try to update mybb from the version 1.6.16 to 1.8.3 appear this error just when I click this button:

MyBB has experienced an internal SQL error and cannot continue.

SQL Error:
1300 - Invalid utf8mb4 character string: 'EA9423'
Query:
SELECT * FROM forum_sessions WHERE sid='916ac7658e97376cfca01d4e5a0da0b4' AND ip=X'02ea9423'

What can I do?
Regards.

Check this topic: http://community.mybb.com/thread-163795.html
This should be fixed in 1.8.4 (sessions will be removed).

Thank you!