may sounds stupid but,how do i use this to change my trait?

C.Eagle - I don't play with ACE so i'm not familiar with the ArmA 3 version, believe it or not. All you have to do, is edit the condition line to include checking the class name of the item in the player's inventory. So...

Current scirpting in condition line of medic trait trigger (as of 10/31/21)...
"vn_b_item_medikit_01" in items player || "Medikit" in items player || "CSLA_MediKit_Z80" in items player || "US85_MediKit" in items player

lets say your ACE item class name is ACE_SuperDuperMedkit

You would add in the following code BEFORE "in items player"...

|| "ACE_SuperDuperMedkit"

So the revised condition line would look like..
"vn_b_item_medikit_01" in items player || "Medikit" in items player || "CSLA_MediKit_Z80" in items player || "US85_MediKit" || "ACE_SuperDuperMedkit" in items player

Hope that helps. : )

Are you able to make an ACE version?