Add a warning/error when a field has both autoincrement and initvalue configured.

[mjmatthiesen]

If the initvalue is anything other than 0, then autoincrement won't trigger, causing you to have bad code, which means you have to reset your autoinc field each time.

field(1; "Entry No."; Integer)
{
    AutoIncrement = true;
    Caption = 'Entry No.';
    DataClassification = CustomerContent;
    InitValue = 1;
}

Rec.Init();
Rec.Field := Value;
Rec.Insert(false);

Leads to an error on the second insert, as it will attempt to insert Entry No. 1 twice. Removing the initvalue property resolves this, or adding Rec.Entry=0