default or selected kernelversion does not have config value CONFIG_IP_DCCP_UNLOAD_HACK.
Result is shown for kernelversion 5.4.123

DCCP control sock unload hack

configname: CONFIG_IP_DCCP_UNLOAD_HACK

Linux Kernel Configuration
└─>Networking
└─>Networking options
└─>DCCP Configuration (EXPERIMENTAL)
└─>DCCP Kernel Hacking
└─>DCCP control sock unload hack
In linux kernel since version 2.6.14 (release Date: 2005-10-27)  
Enable this to be able to unload the dccp module when the it
has only one refcount held, the control sock one. Just execute
"rmmod dccp_ccid3 dccp"

Just say N.