1. A method comprises: determining dispersed storage (DS) units that are storing a set of encoded data slices associated with a data segment; sending a revision level check request message to each of the DS units; receiving revision level check response messages from at least some of the DS units within a time period to produce received revision level check response messages; determining concurrency of a revision level of the set of encoded data slices stored by the DS units based on the received revision level check response messages; and when less than a threshold number of encoded data slices have concurrency of the revision level, initiating a revision concurrency process.