Hi,
First of all , i would recommend you back up the database of the servers.
Then , you may try to disable the corrupt one and observe whether there is a problem with the replication of other members ,after some time try to enable it again.
Remember that : when a disabled member is enabled, the member must complete an initial replication of the replicated folder. Initial replication will cause about 1 KB of data to be transferred for each file or folder in the replicated folder, and any updated or new files present on the member will be moved to the DfsrPrivate\PreExisting folder on the member, and it will be replaced with authoritative files from another member.
Best Regards,