Conflicting mapping with EC pool

See the following thread:

https://lists.ceph.io/hyperkitty/list/ceph-users@ceph.io/thread/YQHH26XSW7E3R5B5G4GNZYENKFNFUG6E/

I tried to add "class hdd" to all my "step take default" rules in the CRUSH map and then run pgremapper. It printed the following errors:

WARNING: pg 77.1b: conflicting mapping 34->9 found when trying to map 39->34
WARNING: pg 71.12: conflicting mapping 8->21 found when trying to map 6->8
WARNING: pg 68.11: conflicting mapping 25->23 found when trying to map 37->25
WARNING: pg 68.11: conflicting mapping 4->0 found when trying to map 11->4
(and many more, but all three pools -- 68, 71, and 77 are my only erasure-coded pools).

Is pgremapper expected to work with EC pools? Thanks!