Which case does a server delete documents?

I have a question about which case a server deletes documents.

I have a DB and its user activity saying that a server deleted a document at certain time.

For example,

2012-12-17 오후 12:53:06 1 0 0 1 KR-SELAPP001/KR/Server/PwC

Each numbers(1 0 0 1) represents reads, adds, updates, deletes respectively.

I’m not sure how I can interpret this.

Did the server delete the document by replicating or delete a corrupted document during fixup task or something else?

Please help me.

Thank you in advance

Subject: Most likely an agent signed with the server ID

or another server replicating with it.