generating wrong operation input in prisma.graphql

[codingfunwoody]

Problem:
I generated a prisma.graphql and the operation input is different with the old version, suppose the operation input of old version is correct.

old version operation input of prisma.graphql:

input BillingRequestUpdatedisbursementDescriptionsInput {
  set: [String!]!
}

new version operation input of prisma.graphql:

input BillingRequestUpdatedisbursementDescriptionsInput {
  set: [String!]
}

old version dependency:

"@prisma/client": "2.11.0"
"@nexus/schema": "0.18.0",
"nexus-plugin-prisma": "0.24.0",

new version dependency:

"@prisma/client": "2.13.1"
"nexus": "1.0.0",
"nexus-plugin-prisma": "0.27.0",

why i concern this:
i use the prisma.graphql to generate the typescript's type and it's different with the prisma-client type because the prisma.graphql operation input is set as optional