OrientDB won't start after upgrade. Cannot create user guest: role guest does not exist

When upgrading Orient DB server from 3.0 to 3.2, the server won't start after running ./server.sh due the following error:

com.orientechnologies.orient.core.exception.OCommandExecutionException: Cannot create user guest: role guest does not exist
        DB name="OSystem"
        at com.orientechnologies.orient.core.sql.parser.OCreateSystemUserStatement.lambda$executeSimple$0(OCreateSystemUserStatement.java:99)
        at com.orientechnologies.orient.core.db.OSystemDatabase.executeWithDB(OSystemDatabase.java:197)
        at com.orientechnologies.orient.core.sql.parser.OCreateSystemUserStatement.executeSimple(OCreateSystemUserStatement.java:48)
        at com.orientechnologies.orient.core.sql.executor.OSingleOpServerExecutionPlan.executeInternal(OSingleOpServerExecutionPlan.java:65)
        at com.orientechnologies.orient.core.sql.parser.OSimpleExecServerStatement.execute(OSimpleExecServerStatement.java:49)
        at com.orientechnologies.orient.core.sql.parser.OServerStatement.execute(OServerStatement.java:72)
        at com.orientechnologies.orient.core.db.OrientDBEmbedded.executeServerStatement(OrientDBEmbedded.java:1255)
        at com.orientechnologies.orient.core.db.OrientDB.execute(OrientDB.java:364)
        at com.orientechnologies.orient.server.OServer.createDefaultServerUsers(OServer.java:1058)
        at com.orientechnologies.orient.server.OServer.loadUsers(OServer.java:904)
        at com.orientechnologies.orient.server.OServer.activate(OServer.java:478)
        at com.orientechnologies.orient.server.OServerMain$1.run(OServerMain.java:49)

Orient DB config file orientdb-server-config.xml has the following users added:

Presumably, a guest role needs to be created for the server to start. However, how does one create this role when the server cannot be started?