I am keen to delete some rows from the AccountHistory related list. This is because I initially did tracking history of too many fields and now the AccountHistory is overly long and this increases the time load of an account page.
Running an anon script via Workbench, I hit this error:
'DML operation DELETE not allowed on AccountHistory'.
I confirmed with Premier Support that AccountHistory (and it seems other History related lists) are locked.
Is there any way to get around this, so that unrequired rows can be deleted?