Do not import configurations if already exists

Question

I have built a custom module and there are two configuration files in config/install directory of my module. When the module is installed the configurations are installed correctly. When I uninstall the module and try to reinstall it, I get the error that that the `

fields already exist in the database

These fields are defined in the configuration files and I want that they should be installed only if they not exist.

`

Answer 1

Move them to config/optional instead.

In that case, they will only be installed if they don't exist yet and if all their dependencies are met.