Fix id flip

internal/topdata/topdata_test.go

@@ -11330,6 +11330,39 @@ func TestBuildNativeSupportsLoosePlainTableAtTopdataDataRoot(t *testing.T) {
 	}
 }
 
+func TestValidateProjectDoesNotRewritePlainDatasetLockfile(t *testing.T) {
+	root := testProjectRoot(t)
+	mkdirAll(t, filepath.Join(root, "topdata", "data", "ruleset"))
+	writeFile(t, filepath.Join(root, "topdata", "base_dialog.json"), "{}\n")
+	lockPath := filepath.Join(root, "topdata", "data", "ruleset", "lock.json")
+	writeFile(t, filepath.Join(root, "topdata", "data", "ruleset", "base.json"), `{
+  "output": "ruleset.2da",
+  "columns": ["Name", "Value"],
+  "rows": [
+    {"id": 0, "key": "ruleset:test_rule", "Name": "TEST_RULE", "Value": "1"}
+  ]
+}`+"\n")
+	writeFile(t, lockPath, "{}\n")
+
+	before, err := os.ReadFile(lockPath)
+	if err != nil {
+		t.Fatalf("read initial lockfile: %v", err)
+	}
+
+	report := ValidateProject(testProject(root))
+	if report.HasErrors() {
+		t.Fatalf("expected validation to succeed, got:\n%s", diagnosticsText(report.Diagnostics))
+	}
+
+	after, err := os.ReadFile(lockPath)
+	if err != nil {
+		t.Fatalf("read lockfile after validation: %v", err)
+	}
+	if string(after) != string(before) {
+		t.Fatalf("expected validation to leave plain dataset lockfile unchanged, got:\n%s", string(after))
+	}
+}
+
 func TestValidateProjectErrorsOnTopPackageAssetCollision(t *testing.T) {
 	root := testProjectRoot(t)
 	mkdirAll(t, filepath.Join(root, "topdata", "data", "repadjust"))