Short description I´m running two PowerDNS 4.2 machines on Ubuntu 20.04 with PowerDNS-Admin and PowerDNS-recursor. Both machines use mysql backends.
The problem is, wehn ever I start a NOTIFY from the Master-Server I get this Error on the Slave:

```
No serial for 'test.local' found - zone is missing?

gmysql Connection successful. Connected to database 'pdns' on '127.0.0.1'.

Starting AXFR of 'test.local' from remote 10.250.82.10

Unable to AXFR zone 'test.local' from remote '10.250.82.10' (resolver): AXFR chunk error: Server Failure (This was the first time. Excluding zone from slave-checks until 1674800595)

```

My config on the Master looks like this:

```
allow-axfr-ips=10.250.82.11
also-notify=10.250.82.11:54
api=yes
api-key=12345678910
daemon=yes
default-soa-name=pdns1.test.local
disable-axfr=no
disable-syslog=no
guardian=yes
include-dir=/etc/powerdns/pdns.d
launch=
local-address=127.0.0.1
local-port=54
master=yes
slave=no

```

My config on the Slave:

```
allow-axfr-ips=10.250.82.10
allow-notify-from=10.250.82.10
api=yes
api-key=12345678910
default-soa-name=pdns2.test.local
disable-axfr=yes
disable-syslog=no
guardian=yes
include-dir=/etc/powerdns/pdns.d
local-address=127.0.0.1
local-port=54
master=no
slave=yes
slave-cycle-interval=60
superslave=yes

```

I also added both nameservers to the zone.
On the slave I added the master to the supermaster table in mysql backend:

```
+--------------+-------------------+---------+
| ip           | nameserver        | account |
+--------------+-------------------+---------+
| 10.250.82.10 | pdns2.test.local | admin   |
+--------------+-------------------+---------+

```

Any idears how I can fix this error?