In T267333 we are migrating some Growth schemas to Event Platform. Along the way, we noticed that there are pretty regular validation errors for a few of them.
Validation errors for the ones already migrated to Event Platform can be seen here:
https://logstash.wikimedia.org/goto/9d596aabff592faa5615d99994a84370
Validation errors for the ones still on eventlogging-processor backend (the server side events) can be seen here (until we migrate them over):
https://logstash.wikimedia.org/goto/2cfeac7fda45c8e8d09444407cb9047e