SOLVED!
Lua Code:
for _, bar in pairs(self.bars) do
if bar then
ClearOverrideBindings(bar)
for _, button in ipairs(bar.buttons) do
if button.keyBoundTarget then
for k = 1, select('#', GetBindingKey(button.keyBoundTarget)) do
local key = select(k, GetBindingKey(button.keyBoundTarget))
if key and key ~= '' then
SetOverrideBindingClick(bar, false, key, button:GetName())
end
end
end
end
end
end