Lockfile priority normalization

internal/topdata/native.go

@@ -1110,7 +1110,7 @@ func pruneLockDataToActiveRows(lockData map[string]int, rows []map[string]any, r
 	}
 	updated := 0
 	for key, rowID := range activeKeys {
-		if lockedID, ok := lockData[key]; ok && lockedID != rowID {
+		if lockedID, ok := lockData[key]; !ok || lockedID != rowID {
 			lockData[key] = rowID
 			updated++
 		}

internal/topdata/topdata_test.go

@@ -8488,6 +8488,72 @@ func TestBuildSpellsAllowsDuplicateBaseKeyToBeSplitAcrossTwoOverrideRenames(t *t
 	}
 }
 
+func TestBuildBaseitemsSplitReaddsRetiredKeyToLockfile(t *testing.T) {
+	root := testProjectRoot(t)
+	mkdirAll(t, filepath.Join(root, "topdata", "data", "baseitems", "modules"))
+	writeFile(t, filepath.Join(root, "topdata", "base_dialog.json"), "{}\n")
+	writeFile(t, filepath.Join(root, "topdata", "data", "baseitems", "base.json"), `{
+  "output": "baseitems.2da",
+  "columns": ["label", "MaxRange"],
+  "rows": [
+    {"id": 58, "key": "baseitems:shortspear", "label": "shortspear", "MaxRange": "100"}
+  ]
+}`+"\n")
+	writeFile(t, filepath.Join(root, "topdata", "data", "baseitems", "lock.json"), "{}\n")
+	writeFile(t, filepath.Join(root, "topdata", "data", "baseitems", "modules", "00_ovr_baseitems_spear.json"), `{
+  "overrides": [
+    {
+      "id": 58,
+      "key": "baseitems:spear",
+      "label": "spear"
+    }
+  ]
+}`+"\n")
+	writeFile(t, filepath.Join(root, "topdata", "data", "baseitems", "modules", "10_add_baseitems_shortspear.json"), `{
+  "entries": {
+    "baseitems:shortspear": {
+      "label": "shortspear",
+      "MaxRange": "255"
+    }
+  }
+}`+"\n")
+	writeFile(t, filepath.Join(root, "topdata", "data", "baseitems", "modules", "20_ovr_baseitems_maxranges.json"), `{
+  "overrides": [
+    {
+      "key": "baseitems:shortspear",
+      "MaxRange": "255"
+    }
+  ]
+}`+"\n")
+	mkdirAll(t, filepath.Join(root, "reference"))
+	writeFile(t, filepath.Join(root, "reference", "build.py"), "print('ok')\n")
+
+	result, err := BuildNative(testProject(root), nil)
+	if err != nil {
+		t.Fatalf("BuildNative failed: %v", err)
+	}
+	lockRaw, err := os.ReadFile(filepath.Join(root, "topdata", "data", "baseitems", "lock.json"))
+	if err != nil {
+		t.Fatalf("read baseitems lock: %v", err)
+	}
+	lockText := string(lockRaw)
+	if !strings.Contains(lockText, `"baseitems:spear": 58`) {
+		t.Fatalf("expected spear lock entry, got:\n%s", lockText)
+	}
+	if !strings.Contains(lockText, `"baseitems:shortspear": 59`) {
+		t.Fatalf("expected shortspear lock entry on new row, got:\n%s", lockText)
+	}
+
+	got, err := os.ReadFile(filepath.Join(result.Output2DADir, "baseitems.2da"))
+	if err != nil {
+		t.Fatalf("read baseitems.2da: %v", err)
+	}
+	text := string(got)
+	if !strings.Contains(text, "58\tspear") || !strings.Contains(text, "59\tshortspear") {
+		t.Fatalf("expected split spear rows in output, got:\n%s", text)
+	}
+}
+
 func TestBuildSkillsIgnoresStaleBaseSpanLockDuringInitialLoad(t *testing.T) {
 	root := testProjectRoot(t)
 	mkdirAll(t, filepath.Join(root, "topdata", "data", "skills", "modules"))