# How to delete a module?

CAUTION

This action is irreversible w.r.t using a SMILE command to undo the delete, you can only revert it using version control actions/machine history.

Enter sbt shell, run command delete-module

[Lottery] $ delete-module LotteryData
[info] deleting module :LotteryData
[info] deleted dir : ../training/lottery/modules/lottery/LotteryData
...
[info] deleted module : LotteryData
[info] remove the entry from .ksmile file and smile

Open .ksmile file, remove the module definition
run command smile