Description Downgrading ESM from 4.5.10 or newer down to 4.5.9 or earlier can cause the following error. Also the installer fails not able to communicate with database. ERROR [installer:74] Exception in run_backward_migrations: Traceback (most recent call last): File “”, line 40, in run_migration_command File “south_utils\run_migrations.py”, line 127, in run_backward_migrations File “south_utils\run_migrations.py”, line 45, in run_migration_command… Continue reading ESM downgrade fails with newly added users