Please see CSPM-2.3.3i-S23.readme. Particular reference is below:
CAVEATS
After installing the S23 signature update, you may see the following
warning message while trying to add a sensor that has been updated to
3.0(5)S23.
"Specified IDS Sensor Version 3.0(5)S23 is not an exact match to a
supported version. All features may not be supported."
This warning message can safely be ignored. CSPM functions properly
with a 3.0(5)S23 sensor.