Issue with firebase query - swift

Question

My query:
let query = recentRef.queryOrderedByChild(FRECENT_GROUPID).queryEqualToValue(group_id)
query.observeSingleEventOfType(.Value, withBlock: { snapshot in
And database structure is :
And my query looks like:
(/Recent {
ep = fb343534ca520c70fe35b0a316ea8e4c;
i = groupId;
sp = fb343534ca520c70fe35b0a316ea8e4c;
})
and getting Snap (Recent) <null> when I print(snapshot).
Its strange that it was working fine but now its suddenly stopped working.
EDIT:
Complete JSON:
{
"Message" : {
"fb343534ca520c70fe35b0a316ea8e4c" : {
"-Kp0jed1EZ5BLllL5_cm" : {
"createdAt" : 1.500046597341153E9,
"groupId" : "fb343534ca520c70fe35b0a316ea8e4c",
"objectId" : "-Kp0jed1EZ5BLllL5_cl",
"senderId" : "lI6SRppSboScWo5xVjcfLL82Ogr2",
"senderName" : "Test1 Test1",
"status" : "",
"text" : "hi",
"type" : "text",
"updatedAt" : 1.50004659734136E9
}
}
},
"Recent" : {
"-Kp0jecwejhzQbbm62CW" : {
"counter" : 0,
"createdAt" : 1.500046600967624E9,
"description" : "Test1 Test1",
"groupId" : "fb343534ca520c70fe35b0a316ea8e4c",
"lastMessage" : "hi",
"members" : [ "lI6SRppSboScWo5xVjcfLL82Ogr2", "fnRvHFpaoDhXqM1se7NoTSiWZIZ2" ],
"objectId" : "-Kp0jecwejhzQbbm62CV",
"picture" : "",
"type" : "private",
"updatedAt" : 1.500046600967647E9,
"userId" : "fnRvHFpaoDhXqM1se7NoTSiWZIZ2"
},
"-Kp0jed-FU1PXt1iPr29" : {
"counter" : 0,
"createdAt" : 1.500046600971885E9,
"description" : "Srikant Root",
"groupId" : "fb343534ca520c70fe35b0a316ea8e4c",
"lastMessage" : "hi",
"members" : [ "lI6SRppSboScWo5xVjcfLL82Ogr2", "fnRvHFpaoDhXqM1se7NoTSiWZIZ2" ],
"objectId" : "-Kp0jed-FU1PXt1iPr28",
"picture" : "https://s3.amazonaws.com/top500golfdev/uploads/profile/srikant.yadav#rootinfosol.com/profilepicture.jpg",
"type" : "private",
"updatedAt" : 1.500046600971896E9,
"userId" : "lI6SRppSboScWo5xVjcfLL82Ogr2"
}
},
"User" : {
"fnRvHFpaoDhXqM1se7NoTSiWZIZ2" : {
"createdAt" : 1.500045753102713E9,
"email" : "srikant.yadav#rootinfosol.com",
"firstname" : "Srikant",
"fullname" : "Srikant Yadav",
"handle" : "Srikant",
"lastname" : "Yadav",
"networkImage" : "https://s3.amazonaws.com/top500golfdev/uploads/profile/srikant.yadav#rootinfosol.com/profilepicture.jpg",
"objectId" : "fnRvHFpaoDhXqM1se7NoTSiWZIZ2",
"online" : false,
"updatedAt" : 1.500045753102731E9
},
"lI6SRppSboScWo5xVjcfLL82Ogr2" : {
"createdAt" : 1.500045791892967E9,
"email" : "test1#gmail.com",
"firstname" : "Test1",
"fullname" : "Test1 Test1",
"handle" : "test1",
"lastname" : "Test1",
"networkImage" : "",
"objectId" : "lI6SRppSboScWo5xVjcfLL82Ogr2",
"online" : false,
"updatedAt" : 1.500046571456235E9
}
}
}