dubinc · steven-tey · Oct 14, 2025 · Oct 10, 2025 · Oct 10, 2025 · Oct 13, 2025
diff --git a/apps/web/app/(ee)/api/groups/[groupIdOrSlug]/route.ts b/apps/web/app/(ee)/api/groups/[groupIdOrSlug]/route.ts
@@ -16,7 +16,7 @@ import {
 } from "@/lib/zod/schemas/groups";
 import { prisma } from "@dub/prisma";
 import { APP_DOMAIN_WITH_NGROK, constructURLFromUTMParams } from "@dub/utils";
-import { DiscountCode, Prisma } from "@prisma/client";
+import { DiscountCode } from "@prisma/client";
 import { waitUntil } from "@vercel/functions";
 import { NextResponse } from "next/server";
 
@@ -94,6 +94,22 @@ export const PATCH = withWorkspace(
       }
     }
 
+    if (additionalLinks) {
+      // check for duplicate link formats
+      const linkFormatDomains = additionalLinks.reduce((acc, link) => {
+        acc.add(link.domain);
+        return acc;
+      }, new Set<string>());
+
+      if (linkFormatDomains.size !== additionalLinks.length) {
+        throw new DubApiError({
+          code: "bad_request",
+          message:
+            "Duplicate link formats found. Please make sure all link formats have unique domains.",
+        });
+      }
+    }
+
     // Find the UTM template
     const utmTemplate = utmTemplateId
       ? await prisma.utmTemplate.findUniqueOrThrow({
@@ -104,20 +120,6 @@ export const PATCH = withWorkspace(
         })
       : null;
 
-    // Deduplicate additionalLinks by domain, keeping the first occurrence
-    const deduplicatedAdditionalLinks = additionalLinks
-      ? additionalLinks.filter(
-          (link, index, array) =>
-            array.findIndex((l) => l.domain === link.domain) === index,
-        )
-      : additionalLinks;
-
-    const additionalLinksInput = deduplicatedAdditionalLinks
-      ? deduplicatedAdditionalLinks.length > 0
-        ? deduplicatedAdditionalLinks
-        : Prisma.DbNull
-      : undefined;
-
     const updatedGroup = await prisma.partnerGroup.update({
       where: {
         id: group.id,
@@ -126,10 +128,10 @@ export const PATCH = withWorkspace(
         name,
         slug,
         color,
-        ...(additionalLinksInput && { additionalLinks: additionalLinksInput }),
+        additionalLinks,
         maxPartnerLinks,
-        utmTemplateId,
         linkStructure,
+        utmTemplateId,
         applicationFormData,
         landerData,
       },

diff --git a/apps/web/app/(ee)/api/groups/route.ts b/apps/web/app/(ee)/api/groups/route.ts
@@ -6,7 +6,6 @@ import { getDefaultProgramIdOrThrow } from "@/lib/api/programs/get-default-progr
 import { parseRequestBody } from "@/lib/api/utils";
 import { withWorkspace } from "@/lib/auth";
 import {
-  additionalPartnerLinkSchema,
   createGroupSchema,
   DEFAULT_PARTNER_GROUP,
   getGroupsQuerySchema,
@@ -117,27 +116,14 @@ export const POST = withWorkspace(
         landerData,
       } = program.groups[0];
 
-      // Deduplicate additionalLinks by domain, keeping the first occurrence
-      const deduplicatedAdditionalLinks =
-        additionalLinks && Array.isArray(additionalLinks)
-          ? (
-              additionalLinks as z.infer<typeof additionalPartnerLinkSchema>[]
-            ).filter(
-              (link, index, array) =>
-                array.findIndex((l) => l.domain === link.domain) === index,
-            )
-          : additionalLinks;
-
       return await tx.partnerGroup.create({
         data: {
           id: createId({ prefix: "grp_" }),
           programId,
           name,
           slug,
           color,
-          ...(deduplicatedAdditionalLinks && {
-            additionalLinks: deduplicatedAdditionalLinks,
-          }),
+          ...(additionalLinks && { additionalLinks }),
           ...(maxPartnerLinks && { maxPartnerLinks }),
           ...(linkStructure && { linkStructure }),
           ...(applicationFormData && { applicationFormData }),