Reported by and :
The culprit is here: https://github.com/Sage-Bionetworks/Synapse-Repository-Services/blob/4833d5bc46926029d94d58baac620373ddb970bf/services/repository-managers/src/main/java/org/sagebionetworks/repo/manager/EntityManagerImpl.java#L284
This should check for View, not EntityView or better yet for Table (so includes both views and tables)
This was deployed on staging. When updating a submission view entity the flag newVersion will now be ignored (set to false by default) as for other types of Table entities.
Confirmed that 318.0-2-g879ccac no longer emits an error on a