I'm trying to update my controller, but it seems like something is wrong.  I have Mongo 3.6.3 which is less then 8.1.0 - so why is this failing

Thanks for the help!

A previous controller version has been detected.
Unpacking omadac (6.0.0.25) over (5.9.9) ...
dpkg: dependency problems prevent configuration of omadac:
 omadac depends on mongodb-server (<< 8.1.0) | mongodb-10gen (<< 8.1.0) | mongodb-org-server (<< 8.1.0); however:
  Version of mongodb-server on system is 1:3.6.3-0ubuntu1.4.
  Package mongodb-10gen is not installed.
  Package mongodb-org-server is not installed.