diff --git a/pkg/swagger/docs.go b/pkg/swagger/docs.go
index 190c2abbe..887255796 100644
--- a/pkg/swagger/docs.go
+++ b/pkg/swagger/docs.go
@@ -8619,7 +8619,7 @@ const docTemplate = `{
                     "type": "boolean"
                 },
                 "done_at": {
-                    "description": "The time when a task was marked as done.",
+                    "description": "The time when a task was marked as done. This field is system-controlled and cannot be set via API.",
                     "type": "string"
                 },
                 "due_date": {
diff --git a/pkg/swagger/swagger.json b/pkg/swagger/swagger.json
index b6d13ce92..0d93980e5 100644
--- a/pkg/swagger/swagger.json
+++ b/pkg/swagger/swagger.json
@@ -8611,7 +8611,7 @@
                     "type": "boolean"
                 },
                 "done_at": {
-                    "description": "The time when a task was marked as done.",
+                    "description": "The time when a task was marked as done. This field is system-controlled and cannot be set via API.",
                     "type": "string"
                 },
                 "due_date": {
diff --git a/pkg/swagger/swagger.yaml b/pkg/swagger/swagger.yaml
index 6ab0d2ce2..43e31e9c4 100644
--- a/pkg/swagger/swagger.yaml
+++ b/pkg/swagger/swagger.yaml
@@ -661,7 +661,8 @@ definitions:
         description: Whether a task is done or not.
         type: boolean
       done_at:
-        description: The time when a task was marked as done.
+        description: The time when a task was marked as done. This field is system-controlled
+          and cannot be set via API.
         type: string
       due_date:
         description: The time when the task is due.