I'm getting the following in the error console. Any help would be appreciated. (I've de-identified personal information using curly brackets.)

Upload failure uploading card: https://owncloud.{my server}/remote.php/dav/addressbooks/users/macho/All%20contacts/68a267c3-81a1-435a-bcbf-1390dfdefb37.vcf.
HTTP Status Code:412

• card properties:
  0 prop: [xpconnect wrapped nsIProperty]; name: DisplayName; value: {contact name}
  1 prop: [xpconnect wrapped nsIProperty]; name: PopularityIndex; value: 0
  2 prop: [xpconnect wrapped nsIProperty]; name: RecordKey; value: 9032
  3 prop: [xpconnect wrapped nsIProperty]; name: PreferMailFormat; value: 0
  4 prop: [xpconnect wrapped nsIProperty]; name: PreferDisplayName; value: 1
  5 prop: [xpconnect wrapped nsIProperty]; name: DbRowID; value: 2348
  6 prop: [xpconnect wrapped nsIProperty]; name: unprocessed:x-group-membership; value: British Columbia
  7 prop: [xpconnect wrapped nsIProperty]; name: groupDavVersionPrev; value: "6ea6130515f5c16b4a8f7bbcf87f6349"
  8 prop: [xpconnect wrapped nsIProperty]; name: groupDavKey; value: 68a267c3-81a1-435a-bcbf-1390dfdefb37.vcf
  9 prop: [xpconnect wrapped nsIProperty]; name: CellularNumber; value: {phone}
  10 prop: [xpconnect wrapped nsIProperty]; name: PhotoType; value: file
  11 prop: [xpconnect wrapped nsIProperty]; name: FirstName; value: {fn}
  12 prop: [xpconnect wrapped nsIProperty]; name: LastName; value: {ln}
  13 prop: [xpconnect wrapped nsIProperty]; name: CardUID; value: 68a267c3-81a1-435a-bcbf-1390dfdefb37
  14 prop: [xpconnect wrapped nsIProperty]; name: PhotoURI; value: file:///home/macho/Pictures/Reference%20photos/people/{fn}%20{ln}.jpg
  15 prop: [xpconnect wrapped nsIProperty]; name: PhotoName; value: 9285292556107864.jpg
  16 prop: [xpconnect wrapped nsIProperty]; name: groupDavVersion; value: -1
  17 prop: [xpconnect wrapped nsIProperty]; name: LastModifiedDate; value: 1489211140
• done