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Failed to start namenode after upgrade from 5.x to 6.x

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Failed to start namenode after upgrade from 5.x to 6.x

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Hi, I'm running Cloudera express, upgraded CM and CDH to 6.2 and getting this error below:

 

Failed to start namenode.

java.io.IOException:

File system image contains an old layout version -60.

An upgrade to version -64 is required.

Please restart NameNode with the "-rollingUpgrade started" option if a rolling upgrade is already started; or restart NameNode with the "-upgrade" option to start a new upgrade.

         at org.apache.hadoop.hdfs.server.namenode.FSImage.recoverTransitionRead(FSImage.java:265)

         at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFSImage(FSNamesystem.java:1084)

         at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.loadFromDisk(FSNamesystem.java:709)

         at org.apache.hadoop.hdfs.server.namenode.NameNode.loadNamesystem(NameNode.java:665)

         at org.apache.hadoop.hdfs.server.namenode.NameNode.initialize(NameNode.java:727)

         at org.apache.hadoop.hdfs.server.namenode.NameNode.<init>(NameNode.java:950)

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