Column 'remote_addr' is used with UNIQUE or INDEX but is not defined as NOT NULL

I'm getting the following error when trying to run the setup.php:

Column 'remote_addr' is used with UNIQUE or INDEX but is not defined as NOT NULL SQL:

So, I manually changed the following line:

remote_addr varchar(15) default NULL,

to

remote_addr varchar(15) NOT NULL,

This fixed the error, but there seemed to be more similiar errors. Am I doing something wrong???

My server is running MySQL 3.22.32

Thanks.