LABs logs not coming through

Course: Elastic Observability Engineer (On-Demand)
Version: 8.2
Question: Something not working properly with Logs for mysql (either sporadic, or not generated at all)

Generally I am in 5.4. LABs section to test out assigning my_mysql_pipeline on Custom Logs integration. But then I see that no logs are coming in. I have deleted and made new integrations for MySQL and Custom Logs - no luck. However, I see then a log with elastic_agent error, which might or might not cause this but I do not know how to fix:

[elastic_agent.filebeat][info] filebeat stopped.
[elastic_agent.filebeat][error] Exiting: data path already locked by another beat. Please make sure that multiple beats are not sharing the same data path (