We are trying to upgrade our ELK from 7.17 to 8.6 using upgrade Assistant.
It is showing critical alert in Kibana and as follows:-
Configuring the "container ID" field has been deprecated and will be removed in 8.0.0. This plugin is designed to work with ECS, and expects this field to have a value of
container.id. It has a different value configured in Source Configuration: Default
Adjust your indexing to identify Docker containers using "container.id".
I tried to check my indices and saw we are using "container.id" only.
Any help would be much appreciated