TXT DKIM record

Hello,
I have ispc 3.2.6 on ubuntu20.04 server.
I face a strange situation.
I have an API script to set DNS TXT record (DKIM)
it tested it and it worked.
I run my script for a new domain.
When calling API with dns_txt_get function I obtain

Code:

   [123] => Array
        (
            [id] => 139
            [sys_userid] => 2
            [sys_groupid] => 3
            [sys_perm_user] => riud
            [sys_perm_group] => riud
            [sys_perm_other] =>
            [server_id] => 4
            [zone] => 7
            [name] => xxx._domainkey.xxx.com.
            [type] => TXT
            [data] => v=DKIM1; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA0cx60b42PO2g   shorten                   
            [aux] => 0
            [ttl] => 3600
            [active] => Y
            [stamp] => 2021-09-21 14:07:08
            [serial] => 0
        )

I review dbispconfig dns_rr table and see same record...
But, /etc/bind/pri.xxx does not contain any TXT DKIM record... and mxtoolbox on line tool told me there is no DKIM for my domain !

I tried to find out a log where I can see an error... I found nothing.

Can you help me where to look in log... ?
I tried

Code:

grep name /var/log/syslog
grep mydomainname /var/log/syslog

 

I find out my mistake.
I sent same server_id for email and DNS.
So, I changed :
table dns_rr => server_id = DNS server id
table mail_user => server_id = POSTFIX/DOVECOT server id
Could you please confirm I am correct for table mail_user ?

 

I saw strange values for uid/gid in mail_user table.
uid = -1, gid = -1
Is that correct ?