Resolvido. Faltou o inner join das outras tabelas.
Select * from Changes
Inner join Usuario on usuario.username = changes.username
inner join customer on customer.id_customer = changes.id_customer
inner join fIm on flm.id_flm = usuario.id_flm
inner join team on team.idteam = usuario.idteam
where team.team = ‘BARCELONA’ and changes.status = ‘ok’