Frequent jenkins log error message:
Attempt to (de-)serialize anonymous class hudson.model.ParametersDefinitionProperty$1 in file:/var/cache/jenkins/war/WEB-INF/lib/jenkins-core-2.121.3.jar; see: https://jenkins.io/redirect/serialization-of-anonymous-classes/
Supposedly resolved by upgraded to 2.135 which isn't (yet) LTS.
update jenkinns core to >= 2.121.3 + plugins to resolve security warnings
This should be resolved when DM-15598 is deployed.
resolved in DM-15598