What does it mean if the same client has the same clock?

I am using yjs+prosemirror to build document application. I saved all the yjs updates and found a strange phenomenon. The same client has the same clock. I don’t know what it means. Can someone help me?
client: 1485998677 has two clock 888

Can you elaborate on the issue? It is not clear to me what you want to show.

Unless you found a sync issue, you shouldn’t care about clocks at all.