received NAK from dhcp server

Hi everyone, thanks in advance for your time.

I have a problem with a connection via a fwa - zte7010 to the mikrotik.

A few hours after restarting the system I receive nak errors that repeat approximately every 15 minutes and I lose the connection

2024-06-06 12:29:24 dhcp,critical,error dhcp-client on vlan1038 lost IP address 91.81.141.229 - received NAK from dhcp server 91.81.141.230
2024-06-06 12:44:27 dhcp,critical,error dhcp-client on vlan1038 lost IP address 91.81.141.229 - received NAK from dhcp server 91.81.141.230
2024-06-06 12:59:31 dhcp,critical,error dhcp-client on vlan1038 lost IP address 91.81.141.229 - received NAK from dhcp server 91.81.141.230
2024-06-06 13:14:35 dhcp,critical,error dhcp-client on vlan1038 lost IP address 91.81.141.229 - received NAK from dhcp server 91.81.141.230
2024-06-06 13:29:38 dhcp,critical,error dhcp-client on vlan1038 lost IP address 91.81.141.229 - received NAK from dhcp server 91.81.141.230
2024-06-06 13:44:45 dhcp,critical,error dhcp-client on vlan1038 lost IP address 91.81.141.229 - received NAK from dhcp server 91.81.141.230
2024-06-06 13:59:49 dhcp,critical,error dhcp-client on vlan1038 lost IP address 91.81.141.229 - received NAK from dhcp server 91.81.141.230


now I tried to connect the ISP router directly and these naks are not there.

I no longer understand what to check and what I should do.
If you can give me a hand I would be truly grateful!
ip-export-hs.rsc (18.4 KB)