grapql query and mutations disappear

Hi Team, 

on my readyapi I've uploaded graphql schema and tried to use mutation in my functional testing which was working fine. But the next day i logged in i observed all queries and mutation disappeared and all tests steps that are related to graphql are disabled and I've view them or delete them. attached screen short below. 

can any one please assist me on how to delete them or why did this issue appeared ? 

Thanks,

Deepthi