I received this error today when I tried to set up an existing dfs replication group.
"error: 9098 a tombstoned content set deletion has been scheduled. Event ID is 4004."
The only way I got around this was to create new folders on each of the replication partners and copy the data into the primary server. After a few minutes, the data had replicated. When I looked at the logs, the aforementioned error appeared for the original folder. I was not sure if it was going to clear our or not.
This is on Server 2012.