rake db:migrate VERSION=0 applies migration

Could you please provide an example app so that we can test this behaviour? Thanks.

I am experiencing this also in 2.3.5. Here's how to reproduce.

$ rails demo
$ cd rails
$ script/generate model user login:string password:string
$ rake db:migrate
==  CreateUsers: migrating ====================================================
-- create_table(:users)
   -> 0.0021s
==  CreateUsers: migrated (0.0022s) ===========================================

$ rake db:migrate VERSION=0
==  CreateUsers: reverting ====================================================
-- drop_table(:users)
   -> 0.0007s
==  CreateUsers: reverted (0.0007s) ===========================================

$ rake db:migrate VERSION=0
==  CreateUsers: migrating ====================================================
-- create_table(:users)
   -> 0.0015s
==  CreateUsers: migrated (0.0016s) ===========================================

including a patch.

Last one had a typo for "target".

Attaching a new patch with test and code fix.