Restrict Delivery Note only after Sales Invoice

Hello guys!
Can we change the workflow like this
SO → SI → DN
Appreciate your feedback.

It is allowing me to create DN from SI but there is no control, we can enter as much as DN we need, there is no control over SI, I believe it is a bug.
Kindly look into it and reply.

Thanks.

It has been fixed in version 5.

version 5 is available for install?

Version 5 is still under active development. If you want to be alpha test user, you are welcome, you can checkout v5.0 branch from github.

thanks for the update.