Select a new Adequate if you have concerns. Airbourne there is no requirement to have this fuel on board at your CP. General airmanship applies. The CPE is at flight planning, the adequate is at flight planning. If you're concerned about your fuel state once taxiing, nominate a new Adequate that's above landing minima and fits the requirements to continue to that adequate with your required fuel. It's not a requirement as technically you're now airborne, but if you're concerned about this then just change your nominated adequate.