Error when saving attendance / using time punch because of IPv6

[AnAxNu]

On a freshly installed 31.0.0.0 I get the error above:
Error Occured while Time Punch Error occured while saving attendance.
The error is caused by the user using an IPv6-address and the database can handle a maximum of 25 characters for the ip. IPv6-addresses can be around 45 characters.
The 2 fields in the Attendance-table are: in_ip and out_ip.
Changing them from VARCHAR(25) to VARCHAR(50) fixes the problem.