My debug log is completely filled with USER_INFO. I adjusted the log levels in all possible combinations hoping to get rid of this. But that didn’t help. Can some one please help me understand what could have caused this?
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Ok, I had the same error, and after much digging, may have a solution.
In the debug log area, delete all logging levels and all traces.
Then in the dev console, do this query (using the tooling API):
SELECT Id FROM TraceFlag
Delete all the resulting rows. There was one row that kept regenerating (probably because I was in the dev console and it corresponded to that).
This fixed the issue for me.