The same CHOP-codes can be assigned multiple times - potential risk for errors

CHOP data are saved in same tables as ICPM / OPS data.

I know that here it was possible many years ago, to assign 1 ICPM code only once to a performed service (or same in service MFD).

This restriction has been removed with Centricity RISi 3.8 in 2001. I can see the scripts for this, bu unfortunately I cannot find the reason for this (it is referred to Doors SR272 or Hotlinecall 23206).