If you have brought the game v Leicester Klub Sportowy forward from Wednesday 7 May to Wednesday 16 April - that is perfectly acceptable. We have always said that teams can mutually agree to bring games forward - as per James' email to all clubs of 31 March - but keep us informed.
I presume that the referee is also still available and is aware of the new date. If not you need to advise Stewart to seek a reappointment
I will amend the website fixture pages