Hi, I am facing a strange issue.

I have two machines running gazebo and I want to use one as gzserver and one as gzclient. I get a version mismatch error: [Err] [ConnectionManager.cc:151] Conflicting gazebo versions gazebo -v outputs 11.5.1 on one machine and 11.3.0 on the other.

So i went apt purge *gazebo* and reinstalled on both with apt install gazebo11=11.5.1-1~focal

But still, the gazebo -v output differs from one machine to the other.
apt policy gives the same versions on both machines.

How can this possibly be? How can I bring both machines to the same gazebo version?

I think it might have to to with a source installation that has not been deleted properly. However, there are no other binaries besides the prebuilt ones.