if you create a new requisition and enter an item text, then you do not yet have a requisition number, the text gets an interim dummy number until you save the requisition, then this dummy number is replaced with the requisition number
in the screenshot in the field text name you can see this dummy number.
IF for some reason you have a real record with such a number in tables STXH and STXL then you get these phantom texts when you create new requisitions.