Ignoring Duplicate packet perl module error

Hi All, *Ignoring duplicate packet from client 192.168.56.1 port 51091 - ID: 52 due to unfinished request in component authorize module perl* - Getting this error when test with 1k Auth requests with the *perl module* only.. no other load and complexity in perl module, just accepting all requests with " return RLM_MODULE_OK; ".. How can I avoid this error?