OJS from to

I’m trying to update from ojs to the latest version but when I try, I got the an error message every single time:
ERROR: Upgrade failed: DB: SQLSTATE[22004]: Null value not allowed: 1138 Invalid use of NULL value (SQL: ALTER TABLE email_log CHANGE assoc_type assoc_type BIGINT NOT NULL, CHANGE assoc_id assoc_id BIGINT NOT NULL)

I can solve but now I 'am having problems with the backup of the plugins, specially with the keycloud plugin.

When I make the upgrade in the list of plugins didn’t appear the keycloud plugin