On 11/2/2025 at 8:49 AM, hawkcfa said:

My MongoDB1 won't start anymore. I tried to upgrade to unraid 7.2.0 and it didn't come up, so I went back down to 7.1.4 and it still won't come back up. Any idea's what I need to do?

{"t":{"$date":"2025-11-02T09:13:34.550-06:00"},"s":"F", "c":"CONTROL", "id":20573, "ctx":"initandlisten","msg":"Wrong mongod version","attr":{"error":"UPGRADE PROBLEM: Found an invalid featureCompatibilityVersion document (ERROR: Location4926900: Invalid featureCompatibilityVersion document in admin.system.version: { _id: \"featureCompatibilityVersion\", version: \"7.0\" }. See https://docs.mongodb.com/master/release-notes/8.0-compatibility/#feature-compatibility. :: caused by :: Invalid feature compatibility version value '7.0'. Expected one of the following versions: ''8.2', '8.1', '8.0'. See https://docs.mongodb.com/master/release-notes/8.0-compatibility/#feature-compatibility.). If the current featureCompatibilityVersion is below 8.0, see the documentation on upgrading at https://docs.mongodb.com/master/release-notes/8.0/#upgrade-procedures."}}

I had the same problem. Took a bit but I fixed it by changing the "Host Path 1" from /mnt/user/appdata/mongodb/ to mongo-volume.

My mongodb stops every time after a few days of working.

I can restart it successfully but again after a few days, boom.

Any help on how to debug this?