Adding fields in model, migrating a sqlite.db in production...good idea?

Hello,
I have a sqlite db that already holds important production data.
Well same time I am developing that application adding functions while I need them.
Well I know not exactly best practice.
Now I need to add two fields to a model (boolean and char),
I want to makemigrations, git add, git commit, git push
Is there any risk of loosing part of the sqlite database here?
Or can I just backup the sqlite file, try to migrate and all the data plus the new empty fields will be there?
If someone with better knowledge can just say "yes should be working"?
Many thanks!
Martin

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