add durability to item

execute as @a[nbt={Inventory:[{id:"minecraft:jigsaw",Slot:-106b}]}] run say works
execute as @a[nbt={Inventory:[{id:"minecraft:jigsaw",Slot:-106b}]}] run data merge entity @s {SelectedItem:{tag:{Damage:0}}}
here is what i have tried. It does say "works" but it doesnt repair the item, if this isnt possible is it possible to modify the other to be unbreakable? like the unbreakable tag