Stopping com.mysql.mysqld from launching over and over and over agin

System messages are showing repeated

Dec 25 14:42:02 ROLANDs-MacBook-Pro com.apple.xpc.launchd (com.mysql.mysqld): Service only ran for 0 seconds. Pushing respawn out by 10 seconds.

every one of two seconds. I think this is being started by com.oracle.oss.mysql.mysqld. Using 'sudo launchctl remove' on both of these doesn't seem to work as after a restart they're both back, so there must be something else happening (Murphy Corollary: before you can do anything, there's something else you have to do first). I have MySQL mysql-5.7.25-macos10.14-x86_64 loaded on the my Macbook Pro and in System Preferences it's being started on bootup. How do I fix this issue ... I'd like to upgrade, but don't want to take this problem forward with the upgrade. Thanks! Roland