Are you trying to activate pattern model rules which are already active?
It's unclear as to the status of the rule: It appears to be inactive because there is a menu option to "Activate" although
below "Activate" is also the option to Delete / Disable. Since Activate is available, is seems logical that it is currently not active.
then I choose Activate and I get the message :
It is active - the column would say Pattern (disabled) if the rule was not active.