Can't replace timestamp , getting [1] "_dateparsefailure"

Elastic Stack Logstash
6

Input string is i.e. all dates like 2017/20/01 13:53:35 I am using bold one in above 'date' after 'csv'

<141>Nov 3 12:53:35 DC1. 1,2017/20/01 13:53:35,001901000999,THREAT,file,1,2017/20/01 13:53:35,1.1.1.1,2.2.2.2,0.0.0.0,0.0.0.0,RULE fake,me,,APP test,vsys1,app,rep,ae1.2,ae2.1,LF-elk,2017/20/01 13:53:35,33891243,1,445,66666,0,0,0x0,tcp,test,"WebFix.exe",Microsoft PE File(52060),any,low,server-to-client,5210010,0x0,10.0.0.0-10.255.255.255,10.0.0.0-10.255.255.255,0,,0,,,0,,,,,,,,0,38,0,0,0,PROD,DC1,