[SOLVED] Upgrading to v0.31.0 (failed to connect to H2)

I’ve gone to upgrade from v0.30.3 to v0.31.0 this morning and I’m having issues.

We’re running Metabase through the Docker image.

Output of error:

11-09 08:46:11 INFO metabase.util :: Loading Metabase...
 11-09 08:46:23 INFO util.encryption :: Saved credentials encryption is DISABLED for this Metabase instance. 🔓
  For more information, see https://www.metabase.com/docs/latest/operations-guide/start.html#encrypting-your-database-connection-details-at-rest
 11-09 08:46:46 INFO metabase.core :: Starting Metabase in STANDALONE mode
 11-09 08:46:46 INFO metabase.core :: Launching Embedded Jetty Webserver with config:
  {:port 3000, :host ""}

 11-09 08:46:46 INFO metabase.core :: Starting Metabase version v0.31.0 (adf9a89 release-0.31.0) ...
 11-09 08:46:46 INFO metabase.core :: System timezone is 'GMT' ...
 WARNING: any? already refers to: #'clojure.core/any? in namespace: monger.collection, being replaced by: #'monger.collection/any?
 11-09 08:46:52 INFO metabase.core :: Setting up and migrating Metabase DB. Please sit tight, this may take a minute...
 11-09 08:46:52 INFO metabase.db :: Verifying h2 Database Connection ...
 11-09 08:46:57 ERROR metabase.driver :: Failed to connect to database: Timed out after 5000 milliseconds.
 11-09 08:46:57 ERROR metabase.core :: Metabase Initialization FAILED
 java.lang.AssertionError: Assert failed: Unable to connect to Metabase h2 DB.
 (binding [*allow-potentailly-unsafe-connections* true] (require (quote metabase.driver)) ((resolve (quote metabase.driver/can-connect-with-details?)) engine details))
 	at metabase.db$verify_db_connection.invokeStatic(db.clj:390)
 	at metabase.db$verify_db_connection.invoke(db.clj:383)
 	at metabase.db$verify_db_connection.invokeStatic(db.clj:386)
 	at metabase.db$verify_db_connection.invoke(db.clj:383)
 	at metabase.db$setup_db_BANG_.invokeStatic(db.clj:452)
 	at metabase.db$setup_db_BANG_.doInvoke(db.clj:446)
 	at clojure.lang.RestFn.invoke(RestFn.java:421)
 	at metabase.core$init_BANG_.invokeStatic(core.clj:162)
 	at metabase.core$init_BANG_.invoke(core.clj:139)
 	at metabase.core$start_normally.invokeStatic(core.clj:246)
 	at metabase.core$start_normally.invoke(core.clj:240)
 	at metabase.core$_main.invokeStatic(core.clj:266)
 	at metabase.core$_main.doInvoke(core.clj:261)
 	at clojure.lang.RestFn.invoke(RestFn.java:397)
 	at clojure.lang.AFn.applyToHelper(AFn.java:152)
 	at clojure.lang.RestFn.applyTo(RestFn.java:132)
 	at metabase.core.main(Unknown Source)
 11-09 08:46:57 INFO metabase.core :: Metabase Shutting Down ...
 11-09 08:46:57 INFO metabase.core :: Metabase Shutdown COMPLETE

How do I go about fixing the upgrade?

I’ve migrated to MySQL and it’s now working.