Starting in MongoDB 7.0, binary downgrades are no longer supported for MongoDB Community Edition.
Starting in MongoDB 7.0, you cannot downgrade your Enterprise deployment's binary version without assistance from support.
To downgrade from 7.0 to 6.0, submit a support request or contact your technical support representative.
MongoDB only supports single-version downgrades. You cannot downgrade to a release that is multiple versions behind your current release.
For example, you may downgrade a 7.0-series to a 6.0-series deployment. However, further downgrading that 6.0-series deployment to a 5.0-series deployment is not supported.