/utility/structure don´t work

Good day, I'm having problems with the tool /utility/structure I find several problems, but it does not solve them, I would like to know how I could solve these problems by hand or how I do so that /utility/structure works well

alter table GDN_UserAuthenticationNonce
-- [Existing: Timestamp timestamp not null default CURRENT_TIMESTAMP, New: Timestamp timestamp not null]
change Timestamp Timestamp timestamp not null;

alter table GDN_UserAuthenticationToken
-- [Existing: Timestamp timestamp not null default CURRENT_TIMESTAMP, New: Timestamp timestamp not null]
change Timestamp Timestamp timestamp not null;

alter table GDN_AccessToken
-- [Existing: DateInserted timestamp not null default CURRENT_TIMESTAMP, New: DateInserted timestamp not null default current_timestamp]
change DateInserted DateInserted timestamp not null default current_timestamp,
-- [Existing: DateExpires timestamp not null default CURRENT_TIMESTAMP, New: DateExpires timestamp not null default current_timestamp]
change DateExpires DateExpires timestamp not null default current_timestamp;

update GDN_User User
set Permissions = ''
where Permissions <> '';

insert GDN_UserMeta
(UserID, Name, Value)
values ('0', 'stubcontent.record.locale', 'es');