[Observium] error in svn

Hello, I can't switch to rolling version. I got this type of error.

[observium]# svn switch https://svn.observium.org/svn/observium/trunk svn: E155025: 'http://svn.observium.org/svn/observium/branches/stable' is not the same repository as 'https://svn.observium.org/svn'