I ran duplicity when my backup drive wasn't connected, and it deleted lots of cached sigtar and manifest files:Synchronizing remote metadata to local cache...Deleting local /Users/justin/.cache/duplicity/a7190bc7f0d9f083cbc7e03931a8c95f/duplicity-full-signatures.20160608T054248Z.sigtar.gz (not authoritative at backend).Deleting local /Users/justin/.cache/duplicity/a7190bc7f0d9f083cbc7e03931a8c95f/duplicity-full.20160608T054248Z.manifest (not authoritative at backend).Deleting local /Users/justin/.cache/duplicity/a7190bc7f0d9f083cbc7e03931a8c95f/duplicity-inc.20160608T054248Z.to.20160610T041839Z.manifest (not authoritative at backend).Deleting local /Users/justin/.cache/duplicity/a7190bc7f0d9f083cbc7e03931a8c95f/duplicity-inc.20160610T041839Z.to.20160616T043456Z.manifest (not authoritative at backend).Now, when I run duplicity, it tries to do a full backup instead of finding my existing incremental backups.Running duplicity collection-status file:///Volumes/DuplicityBackup/ shows that my backup chain has become a secondary backup chain, and there is an empty primary backup chain:$ duplicity collection-status file:///Volumes/DuplicityBackup/Synchronizing remote metadata to local cache...Last full backup date: Thu Jul 28 22:17:39 2016Collection Status-----------------Connecting with backend: LocalBackendArchive dir: /Users/justin/.cache/duplicity/a7190bc7f0d9f083cbc7e03931a8c95fFound 1 secondary backup chain.Secondary chain 1 of 1:-------------------------Chain start time: Tue Jun  7 22:42:48 2016Chain end time: Wed Jul 27 07:19:47 2016Number of contained backup sets: 23Total number of contained volumes: 2329 Type of backup set:                            Time:      Num volumes:                Full         Tue Jun  7 22:42:48 2016              2219         Incremental         Thu Jun  9 21:18:39 2016                20         Incremental         Wed Jun 15 21:34:56 2016                 6         Incremental         Fri Jun 17 07:29:49 2016                 1...-------------------------Found primary backup chain with matching signature chain:-------------------------Chain start time: Thu Jul 28 22:17:39 2016Chain end time: Thu Jul 28 22:17:39 2016Number of contained backup sets: 1Total number of contained volumes: 0 Type of backup set:                            Time:      Num volumes:-------------------------No orphaned or incomplete backup sets found.             How can I fix this? (ie, delete the empty primary backup chain and use the secondary backup chain)
Duplicity: switch to secondary backup chain
duplicity