Aerich wants to alter instead of create new field.

[DusanKovacevic94]

    exp = fields.FloatField(null=False, default=0)
    lvl = fields.IntField(null=False, default=0)

is updated to

    exp = fields.FloatField(null=False, default=0)
    lvl = fields.IntField(null=False, default=0)
    voice_exp = fields.FloatField(null=False, default=0)
    voice_lvl = fields.IntField(null=False, default=0)

Migrate creates this

ALTER TABLE `users` RENAME COLUMN `exp` TO `voice_exp`;
ALTER TABLE `users` RENAME COLUMN `lvl` TO `voice_lvl`;

[long2ice]

So why not choice False when prompt rename?

[DusanKovacevic94]

Oh, I don't know why I thought this will delete exp and lvl to create voice_exp and voice_lvl.

[DusanKovacevic94]

And if aerich guess you are renaming a column, it will ask Rename {old_column} to {new_column} [True], you can choice True to rename column without column drop, or choice False to drop column then create, note that the after maybe lose data. This part of the readme confused me.

[long2ice]

This can be optimizing