1

server-rs/crates/spacetime-module/src/lib.rs

@@ -4142,7 +4142,13 @@ fn upsert_world_foundation_card(
     draft_profile: &JsonMap<String, JsonValue>,
     updated_at_micros: i64,
 ) -> Result<(), String> {
-    let card_id = "world-foundation".to_string();
+    let card_id = build_world_foundation_card_id(session_id);
+    let existing_card = ctx
+        .db
+        .custom_world_draft_card()
+        .card_id()
+        .find(&card_id)
+        .filter(|row| row.session_id == session_id);
     let title = read_optional_text_field(draft_profile, &["name", "title"])
         .unwrap_or_else(|| "世界底稿".to_string());
     let subtitle = read_optional_text_field(draft_profile, &["subtitle"]).unwrap_or_default();
@@ -4164,13 +4170,7 @@ fn upsert_world_foundation_card(
         "warningMessages": [],
     }))?;
 
-    if let Some(existing) = ctx
-        .db
-        .custom_world_draft_card()
-        .card_id()
-        .find(&card_id)
-        .filter(|row| row.session_id == session_id)
-    {
+    if let Some(existing) = existing_card {
         replace_custom_world_draft_card(
             ctx,
             &existing,
@@ -4221,6 +4221,11 @@ fn upsert_world_foundation_card(
     Ok(())
 }
 
+fn build_world_foundation_card_id(session_id: &str) -> String {
+    // `custom_world_draft_card.card_id` 是全局主键，世界底稿卡必须带上会话维度，避免多会话写入时触发唯一键冲突。
+    format!("custom-world:{session_id}:world-foundation")
+}
+
 fn sync_session_draft_profile_from_card_update(
     session: &CustomWorldAgentSession,
     card: &CustomWorldDraftCard,