Rancher 1.2.1 Upgrade Errors in Logs

Rancher server logs are getting flooded with errors following upgrade from 1.2 to 1.2.1. Any ideas how to resolve?

2016-12-16 12:08:46,611 ERROR [ecb8ece0-f4a6-488d-b5c0-b9abb4131276:460031] [volumeStoragePoolMap:3659] [volumestoragepoolmap.remove] [] [cutorService-12] [.p.p.c.g.GenericResourceProcessState] Resource is null, can't find resource id [3659]
2016-12-16 12:08:46,611 ERROR [ecb8ece0-f4a6-488d-b5c0-b9abb4131276:460031] [volumeStoragePoolMap:3659] [volumestoragepoolmap.remove] [] [cutorService-12] [.p.p.c.g.GenericResourceProcessState] Resource is null, can't find resource id [3659]
2016-12-16 12:08:46,754 ERROR [fd2f3d12-828a-42bf-82cd-05b81ea3a6e3:460032] [volumeStoragePoolMap:3659] [volumestoragepoolmap.remove] [] [cutorService-12] [.p.p.c.g.GenericResourceProcessState] Resource is null, can't find resource id [3659]
2016-12-16 12:08:46,755 ERROR [fd2f3d12-828a-42bf-82cd-05b81ea3a6e3:460032] [volumeStoragePoolMap:3659] [volumestoragepoolmap.remove] [] [cutorService-12] [.p.p.c.g.GenericResourceProcessState] Resource is null, can't find resource id [3659]
2016-12-16 12:08:47,014 ERROR [62e737f6-6ad6-4ae4-bc16-e5a6030806fd:460034] [volumeStoragePoolMap:3659] [volumestoragepoolmap.remove] [] [cutorService-12] [.p.p.c.g.GenericResourceProcessState] Resource is null, can't find resource id [3659]
2016-12-16 12:08:47,015 ERROR [62e737f6-6ad6-4ae4-bc16-e5a6030806fd:460034] [volumeStoragePoolMap:3659] [volumestoragepoolmap.remove] [] [cutorService-12] [.p.p.c.g.GenericResourceProcessState] Resource is null, can't find resource id [3659]