Ошибка «конфликт GUID» при переносе почтовых ящиков с помощью doveadm

Я должен перенести почтовые ящики со старого почтового сервера (в команде и журнале упоминается как old.ch), запущенного с помощью sendmail / imapd, на новый сервер (упомянутый ad new.ch) с помощью postfix / dovecot.

Если я запускаю миграцию почтовых ящиков пользователя на вновь созданного пользователя dovecot, я получаю предупреждения «Конфликт GDUI - будет объединен позже» и ничего не переносится. Используемая команда:

sudo doveadm -D -o imapc_host=old.ch -o imapc_port=993 -o imapc_ssl=imaps -o imapc_ssl_verify=no -o imapc_user=tibor -o imapc_password=xxxx backup -R -u tibor.nagy@new.ch imapc: 

Что это может быть? Это отладочный вывод:

Debug: Loading modules from directory: /usr/lib/dovecot/modules/doveadm Debug: Skipping module doveadm_acl_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_acl_plugin.so: undefined symbol: acl_lookup_dict_iterate_visible_next (this is usually intentional, so just ignore this message) Debug: Skipping module doveadm_expire_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_expire_plugin.so: undefined symbol: expire_set_deinit (this is usually intentional, so just ignore this message) Debug: Skipping module doveadm_quota_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib10_doveadm_quota_plugin.so: undefined symbol: quota_user_module (this is usually intentional, so just ignore this message) Debug: Skipping module doveadm_fts_plugin, because dlopen() failed: /usr/lib/dovecot/modules/doveadm/lib20_doveadm_fts_plugin.so: undefined symbol: fts_user_get_language_list (this is usually intentional, so just ignore this message) doveadm(tibor.nagy@new.ch): Debug: Effective uid=1003, gid=1003, home=/home/vmail/new.ch/tibor.nagy/ doveadm(tibor.nagy@new.ch): Debug: Namespace : type=private, prefix=, sep=/, inbox=yes, hidden=no, list=yes, subscriptions=yes location=maildir:/home/vmail/new.ch/tibor.nagy doveadm(tibor.nagy@new.ch): Debug: maildir++: root=/home/vmail/new.ch/tibor.nagy, index=, indexpvt=, control=, inbox=/home/vmail/new.ch/tibor.nagy, alt= doveadm(tibor.nagy@new.ch): Debug: Namespace : Using permissions from /home/vmail/new.ch/tibor.nagy: mode=0700 gid=default dsync(tibor.nagy@new.ch): Debug: Effective uid=1003, gid=1003, home=/home/vmail/new.ch/tibor.nagy/ dsync(tibor.nagy@new.ch): Debug: Namespace : type=private, prefix=, sep=/, inbox=yes, hidden=no, list=yes, subscriptions=yes location=imapc: dsync(tibor.nagy@new.ch): Debug: imapc(old.ch:993): Looking up IP address dsync(tibor.nagy@new.ch): Debug: imapc: root=, index=, indexpvt=, control=, inbox=, alt= dsync(tibor.nagy@new.ch): Debug: imapc(old.ch:993): Connecting to 80.254.175.84:993 dsync(tibor.nagy@new.ch): Debug: imapc(old.ch:993): Starting SSL handshake dsync(tibor.nagy@new.ch): Debug: imapc(old.ch:993): SSL handshake successful, ignoring invalid certificate: SSL certificate not received dsync(tibor.nagy@new.ch): Debug: imapc(old.ch:993): Server capabilities: IMAP4REV1 I18NLEVEL=1 LITERAL+ SASL-IR LOGIN-REFERRALS AUTH=PLAIN AUTH=LOGIN dsync(tibor.nagy@new.ch): Debug: imapc(old.ch:993): Authenticating as tibor dsync(tibor.nagy@new.ch): Debug: imapc(old.ch:993): Server capabilities: IMAP4REV1 I18NLEVEL=1 LITERAL+ IDLE UIDPLUS NAMESPACE CHILDREN MAILBOX-REFERRALS BINARY UNSELECT ESEARCH WITHIN SCAN SORT THREAD=REFERENCES THREAD=ORDEREDSUBJECT MULTIAPPEND dsync(tibor.nagy@new.ch): Debug: imapc(old.ch:993): Authenticated successfully dsync(tibor.nagy@new.ch): Debug: brain M: Local mailbox tree: INBOX guid=c6a821111c4d045bbc2100002c662d20 uid_validity=1527008544 uid_next=1 subs=no last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain S: Local mailbox tree: INBOX guid=c92f64f79f0d1ed01e6d5b314f04886c uid_validity=1286173861 uid_next=61322 subs=yes last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain M: Local mailbox tree: Drafts guid=c5a821111c4d045bbc2100002c662d20 uid_validity=1527008543 uid_next=1 subs=no last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain S: Local mailbox tree: msgFilterRules.dat guid=3c6ecde2cdcc4623e338af47d808f752 uid_validity=1284361367 uid_next=1 subs=no last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain M: Local mailbox tree: Trash guid=c4a821111c4d045bbc2100002c662d20 uid_validity=1527008542 uid_next=1 subs=no last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain M: Local mailbox tree: Junk guid=c3a821111c4d045bbc2100002c662d20 uid_validity=1527008541 uid_next=1 subs=no last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain M: Local mailbox tree: Sent guid=c2a821111c4d045bbc2100002c662d20 uid_validity=1527008540 uid_next=1 subs=no last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain S: Local mailbox tree: Trash guid=7f5af7ba291b2df1a11d573bdb55d7e9 uid_validity=1286180002 uid_next=401 subs=yes last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain M: Remote mailbox tree: INBOX guid=c92f64f79f0d1ed01e6d5b314f04886c uid_validity=1286173861 uid_next=61322 subs=yes last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain M: Remote mailbox tree: msgFilterRules.dat guid=3c6ecde2cdcc4623e338af47d808f752 uid_validity=1284361367 uid_next=1 subs=no last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain M: Remote mailbox tree: Trash guid=7f5af7ba291b2df1a11d573bdb55d7e9 uid_validity=1286180002 uid_next=401 subs=yes last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain S: Local mailbox tree: Sent guid=bfb2e03fdce327671e82bf173b1ccb8b uid_validity=1286180493 uid_next=1841 subs=yes last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain M: Remote mailbox tree: Sent guid=bfb2e03fdce327671e82bf173b1ccb8b uid_validity=1286180493 uid_next=1841 subs=yes last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain S: Local mailbox tree: Junk guid=87680557f26fcb26843f739f7427e8c4 uid_validity=1286179965 uid_next=25641 subs=yes last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain M: Remote mailbox tree: Junk guid=87680557f26fcb26843f739f7427e8c4 uid_validity=1286179965 uid_next=25641 subs=yes last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain S: Local mailbox tree: .mailboxlist guid=bcfcc6a19dbaa2eedbb286c47d105b40 uid_validity=1512742667 uid_next=1 subs=no last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain M: Remote mailbox tree: .mailboxlist guid=bcfcc6a19dbaa2eedbb286c47d105b40 uid_validity=1512742667 uid_next=1 subs=no last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain M: Mailbox INBOX: local=c6a821111c4d045bbc2100002c662d20/0/1, remote=c92f64f79f0d1ed01e6d5b314f04886c/0/1: GUIDs conflict - will be merged later dsync(tibor.nagy@new.ch): Debug: brain M: Mailbox Junk: local=c3a821111c4d045bbc2100002c662d20/0/1, remote=87680557f26fcb26843f739f7427e8c4/0/1: GUIDs conflict - will be merged later dsync(tibor.nagy@new.ch): Debug: brain M: Mailbox Sent: local=c2a821111c4d045bbc2100002c662d20/0/1, remote=bfb2e03fdce327671e82bf173b1ccb8b/0/1: GUIDs conflict - will be merged later dsync(tibor.nagy@new.ch): Debug: brain M: Mailbox Trash: local=c4a821111c4d045bbc2100002c662d20/0/1, remote=7f5af7ba291b2df1a11d573bdb55d7e9/0/1: GUIDs conflict - will be merged later dsync(tibor.nagy@new.ch): Debug: brain M: Mailbox _mailboxlist: local=00000000000000000000000000000000/0/0, remote=bcfcc6a19dbaa2eedbb286c47d105b40/0/1: mailbox not selectable yet dsync(tibor.nagy@new.ch): Debug: brain M: Mailbox msgFilterRules_dat: local=00000000000000000000000000000000/0/0, remote=3c6ecde2cdcc4623e338af47d808f752/0/1: mailbox not selectable yet dsync(tibor.nagy@new.ch): Debug: brain M: Deleting mailbox 'INBOX' (GUID c6a821111c4d045bbc2100002c662d20): UIDVALIDITY changed (1286173861 -> 1527008544) dsync(tibor.nagy@new.ch): Debug: brain M: Deleting mailbox 'Junk' (GUID c3a821111c4d045bbc2100002c662d20): UIDVALIDITY changed (1286179965 -> 1527008541) dsync(tibor.nagy@new.ch): Debug: brain M: Deleting mailbox 'Sent' (GUID c2a821111c4d045bbc2100002c662d20): UIDVALIDITY changed (1286180493 -> 1527008540) dsync(tibor.nagy@new.ch): Debug: brain M: Deleting mailbox 'Trash' (GUID c4a821111c4d045bbc2100002c662d20): UIDVALIDITY changed (1286180002 -> 1527008542) dsync(tibor.nagy@new.ch): Error: Mailbox INBOX sync: mailbox_delete failed: INBOX can't be deleted. dsync(tibor.nagy@new.ch): Debug: brain S: Remote mailbox tree: INBOX guid=c6a821111c4d045bbc2100002c662d20 uid_validity=1527008544 uid_next=1 subs=no last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain S: Remote mailbox tree: Trash guid=c4a821111c4d045bbc2100002c662d20 uid_validity=1527008542 uid_next=1 subs=no last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain S: Remote mailbox tree: Junk guid=c3a821111c4d045bbc2100002c662d20 uid_validity=1527008541 uid_next=1 subs=no last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: brain S: Remote mailbox tree: Sent guid=c2a821111c4d045bbc2100002c662d20 uid_validity=1527008540 uid_next=1 subs=no last_change=0 last_subs=0 dsync(tibor.nagy@new.ch): Debug: imapc(old.ch:993): Disconnected 

Я использую Ubuntu 16.04 и dovecot 2.2.22 на new.ch.