Arducopter 3.5.5 strange log/prearm behaviour

Emlid edge with 3.5.5 that gives message of pream:bad logging and unable to arm
I go on arming check and disable Logging but i have programmed to have log created on disarm, result? It gives me a log, but if i enable checking logging at boot along with everything else, then i only get the prearm message.
Would be thankfull for any ideas. This FC does not have an SD onboard that i can format.
I run the firmware with Etcher, also through GCS, but this think persists and gives logs while at the same time giving logging error message only if i disable logging on boot checks.