how to delete Ftp username tag?

[robinex]

hi,

I wanna use sentora for ftp system.

But ı have problem. when ı crative news ftp user all time add tag on preffix "zadmin_"

screenshot in Attachment

for example my username "deneme" but when ı crative username change "zadmin_deneme". I wanna delete "zadmin_"

please help me