Hi ,
Two options to make it work:
Can you place site CE2's ge-0/0/0.192 interface in site-identifier 3 , things will work
L2VPN is a point to point connection
since ge-0/0/1.0 193 is the first ifl in CE1 and remote site id not mentioned , it will try to form connection with site id 1 at first,as site id 1 is its own site id, CE1 will form connection with sited id 2 's first interface i.e CE2's ge-0/0/0.193 ifl
Next for CE1 's second ifl i.e ge-0/0/1.192 it wil try establishing connection with site id 3 as site 1 and 2 pre-exists.So
please configure CE2's ge-0/0/0.192 ifl under site-id 3 .
Below link you can use for more extensive description of the same.
https://forums.juniper.net/t5/Routing/question-in-L2VPN/td-p/90950
-Vinod