Failure when upgrading from OJS 2.4.8.0 to 3.0 (Postgres)

Hi @asmecher

Is that query. But it’s insane.
ojs3=# select count(*) from submission_files;
count

179843
(1 row)

Time: 36.331 ms

ojs3=# select count(*) from articles_migration;
count

92639
(1 row)

Time: 30.285 ms

ojs3=# select count(*) FROM submission_files sf, articles_migration am WHERE am.submission_file_id=sf.file_id;
count

36354
(1 row)

Time: 78.130 ms

Is there some explanation? Is there other way to upgrade?

Regards,
Tarcisio Pereira.