Inconsistent pruning error message in the logs

[chuck-bear]

Beacond is trying to prune some old blocks, at least what this log line is showing:

ERRR Failed to prune blocks module=state err=failed to prune blocks to height 342736: cannot prune to height 342736, it is lower than base height 6725736 targetRetainHeight=342736 newRetainHeight=6725736

This is seen on validator nodes. This appeared in the latest release (after alpha.4).

[CumpsD]

Could you provide some more context on this please? What do we need to do when this happens? We are having this on v0.2.0-alpha.8 and not passing any arguments.