page_primary_meta_mutation events are created while there is no modification

[gerardnico]

Example:

{ "name": "title", "new_value": null, "old_value": "Turing Machine", "path": ":automata:turing" }

This page automata does not have any title. It seems that the change is created on current metadata and, not persistent.

It means that for each metadata rendering, there is a new event made.