Unique in multiple childs

Hi there,

I have a schema like this

in which the data looks like below

Basically, I am making an API call to insert order Line, and as they are getting inserted, the response result is bringing back the records.

starts with 1 then based on the number on the number of requests, the response brings back all the inserted ones, repeating previously inserted ones.

respose1
{
1
}
respose2
{
1,
2
}
respose3
{
1,
2,
3
}

my goal is to get distinct inserted records

as
Order-Lines : [
{
1,
2,
3
}
]

please find here the sample input for more understanding.

any guidance is greatly appreciated.

Thanks
Manohar