Invalid Lua script evaluation

Hi, i'm calling this simple Lua script passing Redis key to get string value, but key is passed to the ARGV collection.
Also i've noticed that my key passed twice, first as an argument and then as a key. Profiler log provided below

var script = "return redis.call('get', @settingIdKey)");
var preparedScript = LuaScript.Prepare(script);

var redisResult = await database.ScriptEvaluateAsync(preparedScript, new
{
    settingIdKey = (RedisKey)"my key",
});

Profiler log:

"SCRIPT" "LOAD" "return redis.call('get', ARGV[1])"
"EVAL" "return redis.call('get', ARGV[1])" "1" "my key" "my key"
[0 lua] "get" "my key"

Based on the documentation it should treat it as a key