diff --git a/services/web/app/src/Features/Subscription/V1SubscriptionManager.js b/services/web/app/src/Features/Subscription/V1SubscriptionManager.js
index b0c0ff3946..57831a9aa9 100644
--- a/services/web/app/src/Features/Subscription/V1SubscriptionManager.js
+++ b/services/web/app/src/Features/Subscription/V1SubscriptionManager.js
@@ -12,6 +12,7 @@
  * Full docs: https://github.com/decaffeinate/decaffeinate/blob/master/docs/suggestions.md
  */
 let V1SubscriptionManager
+const logger = require('@overleaf/logger')
 const UserGetter = require('../User/UserGetter')
 const request = require('requestretry')
 const settings = require('@overleaf/settings')
@@ -48,6 +49,12 @@ module.exports = V1SubscriptionManager = {
           // Throw away 'anonymous', etc as being equivalent to null
           planName = null
         }
+        if (planName != null && planName !== 'v1_free') {
+          logger.warn(
+            { v1Id, planName },
+            'got non expired personal subscription'
+          )
+        }
         return callback(null, planName, v1Id)
       }
     )