OTRS Create Ticket Issue

[supriya]

I am trying to create Ticket using Rest Generic Interface Webservices in OTRS. I downloaded the packge from OTRS github in which I am having yml files which consist of operations like create ticket,search ticket and update ticket
I imported this package in OTRS and used postman to create Ticket
But the issue is in response I m getting Ticket ID of the Ticket already present in OTRS
The postman performs Get for the operation Search TicketID for my post request so I deleted the search operation from the yml file and tried out but it throws internal server error
Bascially, the create Ticket operation in yml file is not being called
Can I know what the ways to solve this issue

Regards,
Supriya