Regular warnings about CDR in log files

Asterisk version: 13.11.2
FreeePBX version: 13.0.189
CDR Reports Module: 13.0.29.8

Regularly getting the message at least once every 15mins, but often more in our Asterisk logs.

[2016-10-25 15:04:19] WARNING[13918]: func_cdr.c:377 cdr_write_callback: CDR requires a value (CDR(variable)=value)

Is this anything to be concerned with?

No, this is not a functional issue. I believe this is resolved in newer versions of core

ok thanks. currently on core 13.0.114.2, I’ll keep an eye out for any changes in the notes about this in subsequent releases.