Upgrade 1.9.15 to 1.10 error

PHP: 5.5 (ost v1.10 upgrade summary says its compatible)
OS: Ubuntu 14.04 LTS
MySQL: 5.7

I'm getting:
[SELECT A1.* FROM `ost_translation` A1 WHERE (A1.`lang` = 'en_US' AND
A1.`type` = 'phrase')] Table 'ost_database.ost_translation' doesn't
exist
This error repeats 7 times and then the upgrade script stops.

If I click to upgrade again, I get other errors similar to this:
[INSERT INTO `ost_role` SET `flags` = 1, `name` = 'Administradores
Role', `notes` = 'Administradores', `created` = NOW(), `permissions` =
'{\"ticket.create\":1, \"ticket.edit\":1, \"ticket.assign\":1,
\"ticket.transfer\":1, \"ticket.reply\":1, \"ticket.close\":1,
\"ticket.delete\":1, \"task.create\":1, \"task.edit\":1,
\"task.assign\":1, \"task.transfer\":1, \"task.reply\":1,
\"task.close\":1, \"task.delete\":1, \"canned.manage\":1,
\"emails.banlist\":1}', `updated` = NOW()] Duplicate entry
'Administradores Role' for key 'name'

And if I keep clicking to upgrade I always get different errors over and over until it quits to a screen saying "Upgrade Aborted"

I tried truncating ost_role table, pre-creating ost_translation, but I always get a new error about some table already created or non-existence table errors. I could do a manual upgrade but I don't know how to do it.