MongoDB updated this morning to 7.0.1, now wont restart

We have a pod running a MongoDB instance. It was automatically upgraded this morning to 7.0.1 and now wont restart citing;

initandlisten","msg":"Wrong mongod version","attr":{"error":"UPGRADE PROBLEM: Found an invalid featureCompatibilityVersion document (ERROR: Location4926900: Invalid featureCo │
│ mpatibilityVersion document in admin.system.version: { _id: \"featureCompatibilityVersion\", version: \"5.0\" }. See https://docs.mongodb.com/master/release-notes/6.0-compatibility/#feature-compatibility. :: caused by :: Invalid feature compatibility version value '5. │
│ 0'; expected '6.0' or '6.3' or '7.0'

Where would I update this Compatibility version? The pod isn’t running at this point.

Or can I fix the version of MongoDB on the pod to a prior version.