How to co-develop with an integrated studio?

[Poylar]

The project has sanity graphql and two developers.
Developer A: creates a new schema foo, does npm run graphql deploy
Developer B: creates a new schema bar, does npm run graphql deploy and has an error that foo was deleted, if you overwrite this value, then developer A will lose the necessary schema.
How to control this and what are the best practices for this approach to development?

You could just use git , but it takes too long to create one schema. For example, the site has sections that are made by two developers and they should not interfere with each other.

Thanks for your help