Cannot update backup job via API - PVE 6.3.3

Mariusz Miodowski mariusz at
Thu Jan 14 15:25:13 CET 2021

Hello All,

We have noticed problem with latest PVE, when trying to update backup 
job via API.

It looks that problem is caused by maxfiles parameter. If we omit it, 
everything works fine.

This problem is not only related to our environment,  we have already 
got reports from our clients that they also have the same problem.


     [vmid] => 8001
     [starttime] => 00:10
     [maxfiles] => 10
     [storage] => local
     [remove] => 1
     [dow] => tue,wed,sat
     [mode] => snapshot
     [compress] => zstd

HTTP 500 HTTP/1.1 500 error during cfs-locked 'file-vzdump_cron' 
operation: value without key, but schema does not define a default key
Cache-Control: max-age=0
Connection: close
Date: Thu, 14 Jan 2021 14:12:37 GMT
Pragma: no-cache
Server: pve-api-daemon/3.0
Content-Length: 13
Content-Type: application/json;charset=UTF-8
Expires: Thu, 14 Jan 2021 14:12:37 GMT


Mariusz Miodowski
ModulesGarden Development Team Manager

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