Duplicate requests

Hello, I have simple configuration where client request come into Haproxy1 (backend Haproxy2) and this request send to Haproxy2 (backend somewhere). It’s working, no errors, but if there are so many requests, Haproxy1 send duplicate requests to Haproxy2 (health checks is OK). I think that Haproxy2 doesn’t get back OK status to Haproxy1 and this imacts duplicate requests. How i can solve this problem ? increase retry, or something else ?