diff --git a/crates/chart/src/render/table.rs b/crates/chart/src/render/table.rs
index f0839dcfe..4f641afd2 100644
--- a/crates/chart/src/render/table.rs
+++ b/crates/chart/src/render/table.rs
@@ -70,7 +70,7 @@ pub(super) fn draw(ctx: &mut Ctx, chart: &Chart, data: &ChartData, plot: Bx, lay
         let y = top + (layout.headers as f32 + i as f32 + 0.5) * layout.row_height;
         let name_x = if settings.show_keys { x0 + 25.0 } else { x0 + 4.0 };
         if settings.show_keys {
-            let swatch = match plot_kind(chart, series) {
+            let swatch = match plot_kind(chart, series, i) {
                 ChartKind::Line | ChartKind::LineStacked => Swatch::Line,
                 ChartKind::LineMarkers => Swatch::LineMarker,
                 _ => Swatch::Box,
diff --git a/crates/chart/src/tests/data_table.rs b/crates/chart/src/tests/data_table.rs
index 13e2baf6c..ddeee07bc 100644
--- a/crates/chart/src/tests/data_table.rs
+++ b/crates/chart/src/tests/data_table.rs
@@ -1,6 +1,35 @@
 use super::*;
 use gridcraft_model::ChartDataTable;
 
+#[test]
+fn combo_table_keys_use_each_series_index() {
+    let mut c = chart(ChartKind::Combo);
+    c.legend = LegendPos::None;
+    c.data_labels = false;
+    c.data_table = Some(ChartDataTable::default());
+    let mut d = sample(c.kind);
+    // The public renderer also accepts Combo series: the first defaults to columns, later ones to lines.
+    for s in &mut d.series {
+        s.kind = ChartKind::Combo;
+    }
+    let p = render(&c, &d, 900.0, 500.0, &ApproxMeasure);
+    assert_sane(&p, 900.0, 500.0);
+    let header_y = p
+        .iter()
+        .find_map(|p| match p {
+            Prim::Text { text, y, .. } if text == "Q1" => Some(*y),
+            _ => None,
+        })
+        .unwrap();
+    for (i, s) in d.series.iter().enumerate() {
+        let boxes = p.iter().filter(|p| matches!(p, Prim::Rect { y, fill: Some(f), .. } if *f == s.color && *y > header_y)).count();
+        let lines =
+            p.iter().filter(|p| matches!(p, Prim::Line { pts, color, .. } if *color == s.color && pts.iter().all(|p| p[1] > header_y))).count();
+        assert_eq!(boxes, usize::from(i == 0), "series {i}: column key");
+        assert_eq!(lines, usize::from(i > 0), "series {i}: line key");
+    }
+}
+
 #[test]
 fn tables_draw_source_values_for_every_supported_chart_kind() {
     for kind in ALL_KINDS {
diff --git a/docs/chart-parity.md b/docs/chart-parity.md
index 311bd2635..39851f2bc 100644
--- a/docs/chart-parity.md
+++ b/docs/chart-parity.md
@@ -1,6 +1,6 @@
 # Chart parity
 
-> **Last reviewed:** 2026-10-18 · **Last updated:** 2026-11-02 · **Change:** minor (doughnut charts: every series is a concentric ring, the first series innermost; hole size and first slice angle kept; rotated slices cover their own sweep; legend names categories; earlier: charts resize from eight handles, chart data tables, legend keys and borders, native XLSX round-trip and print/PDF; earlier: selected chart source outlines stay beneath floating objects) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
+> **Last reviewed:** 2026-10-18 · **Last updated:** 2026-11-07 · **Change:** minor (chart-data-table keys pass the series index to the shared combo plot-kind rule, restoring compilation after #1150; earlier: doughnut charts: every series is a concentric ring, the first series innermost; hole size and first slice angle kept; rotated slices cover their own sweep; legend names categories; earlier: charts resize from eight handles, chart data tables, legend keys and borders, native XLSX round-trip and print/PDF; earlier: selected chart source outlines stay beneath floating objects) · **Target:** Microsoft Excel (Microsoft 365), Excel for Mac 16.113.4
 
 Excel's chart types and chart elements against GridCraft. Part of
 [target-app-parity.md](target-app-parity.md). **Breadth ~50%, ready ~30%, 40–60 h** (estimated).
@@ -107,6 +107,7 @@ are (#1686). Such series get no `numCache`/`strCache` on save (#1690).
 
 | Date | Change | Summary |
 |---|---|---|
+| 2026-11-07 | minor | Chart-data-table keys use the shared plot-kind helper with their series index after #1150. A focused regression checks the first combo series uses a column key and later series use line keys. No readiness score change. |
 | 2026-11-02 | minor | Charts move and resize from eight handles, each moving only its own edges (#190); resizing leaves the work list (1–2 h, within the 40–60 h rounding) |
 | 2026-11-01 | minor | Chart data tables for column, bar, line, area and compatible combo charts: command/UI controls, formatted source values, blanks, grouped category headers, legend keys, independent borders, shared print/PDF rendering and native c:dTable import/export. Dense tables show a space notice; no readiness score change. |
 | 2026-10-29 | minor | Selected charts highlight their source cells beneath floating objects, so the blue outline no longer crosses the chart; uncovered source cells remain highlighted (#2861) |