Error: Bad Request

Now I am getting this.

[2019-05-03 09:07:05] ERROR: User Sync > Error subscribing or updating user 64: Bad Request. Invalid Resource. Your merge fields were invalid.
– MMERGE3 : Please enter a value
– PHONE : Please enter a value
Request: PATCH https://us5.api.mailchimp.com/3.0/lists/2469124d20/members/34754058ef8b9d90350165b992a0ffe8 – {“email_address”:”darr*******@gm***.com”,”interests”:{},”merge_fields”:{“FNAME”:”testyrdy”,”LNAME”:”rytuigjcghjcf”,”NAME”:”testyrdy rytuigjcghjcf”},”status”:”unsubscribed”,”email_type”:”html”,”tags”:[]}
Response: 400 Bad Request – {“type”:”http://developer.mailchimp.com/documentation/mailchimp/guides/error-glossary/”,”title”:”Invalid Resource”,”status”:400,”detail”:”Your merge fields were invalid.”,”instance”:”dad49e64-b14a-406c-ba02-c8e1c0d76730″,”errors”:[{“field”:”MMERGE3″,”message”:”Please enter a value”},{“field”:”PHONE”,”message”:”Please enter a value”}]}