Zimbra Full Backup/Incremental Backup Issue

[mnaeemrao]

Hello I am using Zimbra Release 8.7.11_GA_1854.RHEL7_64_20170531151956 RHEL7_64 FOSS edition. I sheduled Zimbra full backup, incremental backup & alias backup through cron job. After 30th September zmbackup is not executing/running. When i run backup -f command thrugh zimbra user I get the output:

parallel: This should not happen. You have found a bug.
Please contact [email protected] and include:

• The version number: 20160222

• The bugid: pidtable format: 1879 1

• The command line being run

• The files being read (put the files on a webserver if they are big)

If you get the error on smaller/fewer files, please include those instead.
Nothing to do. Closing...