Definitely recommend you tell the truth.
I had mild asthma when I was young ( 7-12 ).
I don't even require the yearly peak flow test for Class 1 Renewal.
The history doesn't seem to concern them just your current health.
Many children are miss-diagnosed with Asthma at an early age.
I was honest with both the RAF and the CAA and it paid off in both cases.
Additionally I do know of someone who did lie and was found out. They stripped the Class 1 of him even though the problem did not prevent a renewal.
Good Luck
P.s. if the answer is "NO," Appeal it, this is when telling the truth pays off.