However, for performance reasons, it have been reverted (
So it means that we have, in the Activity Stream, custom parameters called "param1", "param2", "param3", "param4" and "param5" that we cannot use in Event Stream.
The correct way to fix this issue is
XWIKI-7554, but until we find how to make it without performance issue, we could also simply add "param1", "param2", "param3", "param4" and "param5" to the Event Stream module, even if it looks a bit ugly.
Unless ActivityStream had never used them, it means now we have some data store in the wiki that Event Stream is not able to load...