When I use the code below, I'm able to erase the existing project sharing and create a new project sharing. Instead of removing the old project sharing and adding a new one, how can I update the project sharing?

When I use the code below, I'm able to erase the existing project sharing and create a new project sharing.

Instead of removing the old project sharing and adding a new one, how can I update the project sharing?

Code I'm using in Workfront API Body:

{
"accessRules": [

{
"accessorID": "64bad82634543dda7e63de881230fc",
"accessorObjCode": "TEAMOB",
"coreAction": "EDIT"
}
}