[trevius]

I am not sure what that conversion sql stuff is, but it looks really old. It looked like you were closer before you started running those. Your first error shows this:

Unknown column 'augslot1visible' in 'field list'

Which is an issue that means you are trying to update your database with a new items table, but the existing items table is designed wrong. The augslot1visible used to be named differently until a recent change. You should just need to make sure that you run the SQL to change that field in your table before sourcing your items back in. Here is the SQL change from R292:

alter table items drop column augslot1visible;
alter table items drop column augslot2visible;
alter table items drop column augslot3visible;
alter table items drop column augslot4visible;
alter table items drop column augslot5visible;

alter table items change column `augslot1unk` `augslot1visible` tinyint(3);
alter table items change column `augslot2unk` `augslot2visible` tinyint(3);
alter table items change column `augslot3unk` `augslot3visible` tinyint(3);
alter table items change column `augslot4unk` `augslot4visible` tinyint(3);
alter table items change column `augslot5unk` `augslot5visible` tinyint(3);