This is the definitive signal of a shared-secret mismatch specifically between the device and this particular login-authentication server. Because it's isolated from the base client table's equivalent counter, a rise here without a corresponding rise in the base table's counter tells the admin exactly which of the two separately-configured secrets, login-specific or general, needs re-checking. For example, this counter climbing while the base client table's bad-authenticator counter stays flat confirms the problem is specifically with the cienaCesRadiusUserLoginAuthKey, not with any secret used elsewhere on the device.