diff --git a/data/graphql/ghae/schema.docs-ghae.graphql b/data/graphql/ghae/schema.docs-ghae.graphql
index d2dac3732cb1..264530806845 100644
--- a/data/graphql/ghae/schema.docs-ghae.graphql
+++ b/data/graphql/ghae/schema.docs-ghae.graphql
@@ -641,9 +641,10 @@ input AddPullRequestReviewThreadInput {
   clientMutationId: String
 
   """
-  The line of the blob to which the thread refers. The end of the line range for multi-line comments.
+  The line of the blob to which the thread refers, required for line-level
+  threads. The end of the line range for multi-line comments.
   """
-  line: Int!
+  line: Int
 
   """
   Path to the file being commented on.
diff --git a/data/graphql/ghec/schema.docs.graphql b/data/graphql/ghec/schema.docs.graphql
index 80952ddac1c7..aec481e25cb6 100644
--- a/data/graphql/ghec/schema.docs.graphql
+++ b/data/graphql/ghec/schema.docs.graphql
@@ -808,9 +808,10 @@ input AddPullRequestReviewThreadInput {
   clientMutationId: String
 
   """
-  The line of the blob to which the thread refers. The end of the line range for multi-line comments.
+  The line of the blob to which the thread refers, required for line-level
+  threads. The end of the line range for multi-line comments.
   """
-  line: Int!
+  line: Int
 
   """
   Path to the file being commented on.
diff --git a/data/graphql/schema.docs.graphql b/data/graphql/schema.docs.graphql
index 80952ddac1c7..aec481e25cb6 100644
--- a/data/graphql/schema.docs.graphql
+++ b/data/graphql/schema.docs.graphql
@@ -808,9 +808,10 @@ input AddPullRequestReviewThreadInput {
   clientMutationId: String
 
   """
-  The line of the blob to which the thread refers. The end of the line range for multi-line comments.
+  The line of the blob to which the thread refers, required for line-level
+  threads. The end of the line range for multi-line comments.
   """
-  line: Int!
+  line: Int
 
   """
   Path to the file being commented on.
diff --git a/src/graphql/data/dotcom/changelog.json b/src/graphql/data/dotcom/changelog.json
index 524f9a474111..0402d4b2d920 100644
--- a/src/graphql/data/dotcom/changelog.json
+++ b/src/graphql/data/dotcom/changelog.json
@@ -1,4 +1,17 @@
 [
+  {
+    "schemaChanges": [
+      {
+        "title": "The GraphQL schema includes these changes:",
+        "changes": [
+          "<p>Input field <code>AddPullRequestReviewThreadInput.line</code> changed type from <code>Int!</code> to <code>Int</code></p>"
+        ]
+      }
+    ],
+    "previewChanges": [],
+    "upcomingChanges": [],
+    "date": "2023-04-04"
+  },
   {
     "schemaChanges": [
       {
diff --git a/src/graphql/data/dotcom/schema.json b/src/graphql/data/dotcom/schema.json
index da46f45596ec..b75c2dd9f38b 100644
--- a/src/graphql/data/dotcom/schema.json
+++ b/src/graphql/data/dotcom/schema.json
@@ -83846,8 +83846,8 @@
         },
         {
           "name": "line",
-          "description": "<p>The line of the blob to which the thread refers. The end of the line range for multi-line comments.</p>",
-          "type": "Int!",
+          "description": "<p>The line of the blob to which the thread refers, required for line-level\nthreads. The end of the line range for multi-line comments.</p>",
+          "type": "Int",
           "id": "int",
           "kind": "scalars",
           "href": "/graphql/reference/scalars#int"
diff --git a/src/graphql/data/ghae/schema.json b/src/graphql/data/ghae/schema.json
index 2481f7529f6c..87e000832dc6 100644
--- a/src/graphql/data/ghae/schema.json
+++ b/src/graphql/data/ghae/schema.json
@@ -68934,8 +68934,8 @@
         },
         {
           "name": "line",
-          "description": "<p>The line of the blob to which the thread refers. The end of the line range for multi-line comments.</p>",
-          "type": "Int!",
+          "description": "<p>The line of the blob to which the thread refers, required for line-level\nthreads. The end of the line range for multi-line comments.</p>",
+          "type": "Int",
           "id": "int",
           "kind": "scalars",
           "href": "/graphql/reference/scalars#int"
diff --git a/src/graphql/data/ghec/schema.json b/src/graphql/data/ghec/schema.json
index da46f45596ec..b75c2dd9f38b 100644
--- a/src/graphql/data/ghec/schema.json
+++ b/src/graphql/data/ghec/schema.json
@@ -83846,8 +83846,8 @@
         },
         {
           "name": "line",
-          "description": "<p>The line of the blob to which the thread refers. The end of the line range for multi-line comments.</p>",
-          "type": "Int!",
+          "description": "<p>The line of the blob to which the thread refers, required for line-level\nthreads. The end of the line range for multi-line comments.</p>",
+          "type": "Int",
           "id": "int",
           "kind": "scalars",
           "href": "/graphql/reference/scalars#int"