LC0030 - StefanMaron/BusinessCentral.LinterCop GitHub Wiki
Internal
for Install/Upgrade codeunits
Set Access property to It is advisable to set Access = Internal for Install and/or Upgrade codeunits. Such codeunits generally do not contain procedures intended for use by other extensions.
Example
codeunit 50100 "MyCodeunit"
{
SubType = Install;
Access = Internal;