Adaptation planning - COVID - Competition postponed by 1 or 2 months

Hello,
I prepared a half Ironman for mid may.
The competition is canceled and the new date is mid June or mid July.
I did the Base Phase (8 weeks) and the Build Phase (8 weeks).

For next, what do you recommend ?
Continue normally and do the Specific Session but twice.
or redo a build phase ?
Thanks
Sportively