I9300 CSC version: unknown
 

I updated an i9300 with octopus, but it is slow and csc: unknown, how can I fix it?
firmware version I9300XXUGNA7_I9300OJVGNA1

Platform: Samsung Android
Selected port: COM1
Selected model: GT-I9300
Detected phone model: GT-I9300
Firmware compiled date: Fri Dec 13 22:04:46 KST 2013
PDA version: I9300XXUGML2
CSC version: Unknown
SW version: I9300BUUGMK1
Phone IMEI: 3549530XXXXXXXX
Phone SN: 00000000000
Android version: 4.3 (JSS15J)

Try to write other firmwares.