Tables without primary keys?

[robdog]

So, I am looking at MySQL 8 with row level replication. I really wanted to use the setting, force primary key on each table. However, some XenForo tables don't appear to have a primary key. Examples: xf_oauth_client, xf_oauth_request

Is there a reason to not have primary keys for these tables? Or am I crazy trying to use that setting?

PS - Apologies if this is not a bug report. Go ahead and move it to the right place. (maybe enhancement request?)
Tables without primary keys?

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