Unable to delete the tunnel interface on the Panorama

• When trying to deleting the tunnel interface on Panorama, error message  "Error deleting Tunnel interface" and "Failed to delete Tunnel interface" is displayed
• Although the message on GUI displays reference for template, the tunnel is not referenced anywhere.

• Panorama
• PANOS-10.2.8-hx
• Tunnel Interface

1. The issue is resolved under PAN-25013
2. Fix is available in 11.1.2h4  and 11.1.3 versions
3. Fix will also be available in the upcoming releases of 11.0.5, 10.2.10.

1. login to the CLI and set the cli config-output-format to set
2. Search for any existing configuration for the tunnel interface associated with the template (Example command for interface tunnel.20 below).

admin@Secondary-panorama(secondary-active)# show template BGP-OSPF-FW | match tunnel.20 
set template BGP-OSPF-FW config vsys vsys1 zone UNTRUST network layer3 [ ethernet1/1 ethernet1/2 tunnel.20 ] 
set template BGP-OSPF-FW config vsys vsys1 import network interface [ ethernet1/1 ethernet1/2 ethernet1/3 ethernet1/4 ethernet1/5 vlan loopback tunnel sdwan tunnel.20 ] 
set template BGP-OSPF-FW config network interface tunnel units tunnel.20 
set template BGP-OSPF-FW config network virtual-router VR-1 interface [ ethernet1/1 ethernet1/2 ethernet1/3 ethernet1/4 ethernet1/5 tunnel.20 ] 

3. If there is any configuration still referenced in the template like below you can delete that configuration from the template

admin@Secondary-panorama(secondary-active)# delete template BGP-OSPF-FW config vsys vsys1 zone UNTRUST network layer3 tunnel.20
admin@Secondary-panorama(secondary-active)# delete template BGP-OSPF-FW config network virtual-router VR-1 interface tunnel.20
admin@Secondary-panorama(secondary-active)# delete template BGP-OSPF-FW config vsys vsys1 import network interface tunnel.20
admin@Secondary-panorama(secondary-active)# delete template BGP-OSPF-FW config network interface tunnel units tunnel.20