Grafana displaying unconnected worker

[DamienMure]

Hi.
here is the workflow:

• core and worker @ 6.0.0
  Add IEXEC_CORE_REQUIRED_WORKER_VERSION=6.0.2 to core

after rebooting everyone (without upgrade any version):
->worker is looping on Bad version! please upgrade your iexec-worker [current:6.0.0, required:6.0.2] (as expected)
->however, on the core, grafana shows me that the worker is well connected with no delay. (not as expected)