another noisy lifter ?

This is a pre magnum 318 hydralic flat tappet cam. The engine hasn't been started for 12-18 months but ran fine before. I just got it going again, has excellent oil pressure but has a noisy lifter or 2. Can i expect the ticking to go away if i keep running it or should i be doing something .
Can the engine be damaged if the ticking continues
Thx for looking
It should quiet down if the engines is in good health. Good oil pressure, not worn out. If the engine has good oil pressure, should not be hurt by noisy lifters for a while.