diff --git a/packages/prisma/migrations/20240711080953_unique_username_in_org/migration.sql b/packages/prisma/migrations/20240711080953_unique_username_in_org/migration.sql
new file mode 100644
index 0000000000..39d5fcb436
--- /dev/null
+++ b/packages/prisma/migrations/20240711080953_unique_username_in_org/migration.sql
@@ -0,0 +1,8 @@
+/*
+  Warnings:
+
+  - A unique constraint covering the columns `[username,organizationId]` on the table `Profile` will be added. If there are existing duplicate values, this will fail.
+
+*/
+-- CreateIndex
+CREATE UNIQUE INDEX "Profile_username_organizationId_key" ON "Profile"("username", "organizationId");
diff --git a/packages/prisma/schema.prisma b/packages/prisma/schema.prisma
index 62c9432f2c..ae5a0d9cba 100644
--- a/packages/prisma/schema.prisma
+++ b/packages/prisma/schema.prisma
@@ -349,7 +349,11 @@ model Profile {
   createdAt      DateTime    @default(now())
   updatedAt      DateTime    @updatedAt
 
+  // A user can have multiple profiles in different organizations
   @@unique([userId, organizationId])
+  // Allow username reuse only across different organizations
+  @@unique([username, organizationId])
+
   @@index([uid])
   @@index([userId])
   @@index([organizationId])