I just saw that there might be a mistake in the document number of an external sspecification (see pictures below).Anyway it looks like this standard was not placed in SAP for this project and it is a general standard of GWM like GWT A H01-01 and GWT A H20-50. If is a general GWM standard I suggest to ask standards department to place it in SAP because you won´t have to care for updates anymore and the document number will normally be correct anyway after the document was created by standards department. If not please check the document number.