CallerCC might cause conflicting cost centre declarations.
In the caller CC center we give all cost centres the EXPR flavour and assign them ids starting with 1.
If the derived name and assigned index conflicts with a user defined SCC of the same name and index then one will shadow the other causing missleading profiles but thankfully nothing worse.
The solution is either to add another field as identification to the EXPR flavour, or add a new flavour constructor.