WJEPUEFMROUTZDAPOLXXRK5BZZUDP3JWJLZXZ76KRE36JUV5TZOAC
for _,id in ipairs(Cache[src].links[rel]) do
if id == target then
add_error(('%s is already a %s of %s'):format(target, rel, src))
return false
if Cache[src].links[rel] then
for _,id in ipairs(Cache[src].links[rel]) do
if id == target then
add_error(('%s is already a %s of %s'):format(target, rel, src))
return false
end