[Observium] svn update problem

As anyone else see this [root@observium2 observium]# svn update svn: E155036: Please see the 'svn upgrade' command svn: E155036: Working copy '/opt/observium' is too old (format 10, created by Subversion 1.6)

observium version 0.15.9.7054 svn version 1.7.4 CentOS release 6.7