Improve error message about migration version gaps

[javiertoledo]

Feature Request

Description

The current error message is

Received an undefined migration value. Are there "gaps" between the versions of the migrations?

Possible Solution

We should specify something more meaningful, telling the user how to fix the issue.

[antoooks]

Hi can I take this one? @javiertoledo

[javiertoledo]

Sure thing! I’ll assign it to you, thanks!

[antoooks]

Thank you Javier, could you describe briefly how user can fix the issue? @javiertoledo