diff --git a/app/utils/db.ts b/app/utils/db.ts
index 581bd546..408dc967 100644
--- a/app/utils/db.ts
+++ b/app/utils/db.ts
@@ -73,3 +73,30 @@ export async function normalizeOrderField(table: string): Promise<void> {
     );
   });
 }
+
+/**
+ * Normalizes contributor order separately for every milestone.
+ *
+ * A contributor may have multiple roles in a milestone, so all of its pivot
+ * rows must receive the same order value.
+ */
+export async function normalizeContributorOrder(): Promise<void> {
+  await db.rawQuery(`
+    WITH normalized AS (
+      SELECT
+        "milestone_id",
+        "contributor_id",
+        ROW_NUMBER() OVER (
+          PARTITION BY "milestone_id"
+          ORDER BY MIN("order") ASC, "contributor_id" ASC
+        ) AS "new_order"
+      FROM "contributor_roles"
+      GROUP BY "milestone_id", "contributor_id"
+    )
+    UPDATE "contributor_roles" AS "target"
+    SET "order" = "normalized"."new_order"
+    FROM "normalized"
+    WHERE "target"."milestone_id" = "normalized"."milestone_id"
+      AND "target"."contributor_id" = "normalized"."contributor_id";
+  `);
+}
diff --git a/commands/db_normalize_order.ts b/commands/db_normalize_order.ts
index 1b55839c..b817aa26 100644
--- a/commands/db_normalize_order.ts
+++ b/commands/db_normalize_order.ts
@@ -1,13 +1,13 @@
 import { BaseCommand, flags } from "@adonisjs/core/ace";
 import type { CommandOptions } from "@adonisjs/core/types/ace";
 
-import { normalizeOrderField } from "#utils/db";
+import { normalizeContributorOrder, normalizeOrderField } from "#utils/db";
 
 export default class DbNormalizeOrder extends BaseCommand {
   static commandName = "db:normalize-order";
   static description =
     "Replaces the order columns with a fresh integer sequence, keeping the entry order unchanged";
-  private orderedTables = ["contributors", "guide_articles", "guide_questions"];
+  private orderedTables = ["guide_articles", "guide_questions"];
 
   static options: CommandOptions = {
     startApp: true,
@@ -34,6 +34,10 @@ export default class DbNormalizeOrder extends BaseCommand {
     }
 
     const tasks = this.ui.tasks();
+    tasks.add("Normalize contributor order for each milestone", async () => {
+      await normalizeContributorOrder();
+      return "done";
+    });
     for (const table of this.orderedTables) {
       tasks.add(`Normalize order for table "${table}"`, async () => {
         await normalizeOrderField(table);