All ideas start is here:
/t/14613/1
But very shortly -
May (can) I write LP 1, LP 2, ... in the column "Discnumber" if it is marked vinyl number?
May (can) I write CD 1, CD 2, ... in the column "Discnumber" if it is marked CD's (compact disc) number?
May (can) I write A1, A2, ... , B1, B2, ... in the column "Track", if it is marked vinyl track number?
Or in the columns "Discnumber" and "Track" may (can) write only numbers? But no letters.
See attachment above.