I installed flarum in localhost and when finished input username, host, pass, etc. told to update the database password and when the password is entered immediately appears an error like this:
Something went wrong: SQLSTATE[HY000]: General error: 1005 Can't create table forum.rmdiscussions (errno: 121 "Duplicate key on write or update") (SQL: alter table rmdiscussions add constraint rmdiscussions_user_id_foreign foreign key (user_id) references rmusers (id) on delete set null)