Authorize the agent to access projects/groups

GitLab CI/CD
1

Hi all,
I’m using GitLab Community Edition 14.10.5 and K8S cluster on premise.
I have read documentation at Authorize the agent to access projects in your groups
The structure of the projects is as follows:

Group1
|______ Group A
|_____________ Group A1
|______________________ Project 1
|______________________ Project 2
|_____________ Group A2
|______________________ Project 3
|______________________ Project 4
|_____________ Group A3
|______________________ Project 5
|______________________ Project 6
and so on …

I tried to create only 1 agent at Project 1 and let other projects reuse it but it doesn’t work.
Project 1 : .gitlab/agents/agent1/config.yaml

ci_access:
  groups:
    - id: Group1/GroupA/GroupA1
    - id: Group1/GroupA

Only Project 1 & 2 can use this agent1
kubectl config use-context Group1/GroupA/GroupA1/project1:agent1
Other projects (3 4 5 6) cannot find ( kubectl config get-contexts) or use it.
I have to create 2 more agents at Group A2 (project 3 & 4) and Group A3 (project 5 & 6)
Please give me some advice, thank you very much.