diff --git a/lib/membership/member.ex b/lib/membership/member.ex
index 7b898a8..5641528 100644
--- a/lib/membership/member.ex
+++ b/lib/membership/member.ex
@@ -242,9 +242,4 @@ defmodule Mv.Membership.Member do
     # The relationship is optional (allow_nil? true by default)
     has_one :user, Mv.Accounts.User
   end
-
-  # Define identities for upsert operations
-  identities do
-    identity :unique_email, [:email]
-  end
 end
diff --git a/priv/repo/migrations/20250926180341_add_unique_email_to_members.exs b/priv/repo/migrations/20250926180341_add_unique_email_to_members.exs
deleted file mode 100644
index 51b874f..0000000
--- a/priv/repo/migrations/20250926180341_add_unique_email_to_members.exs
+++ /dev/null
@@ -1,17 +0,0 @@
-defmodule Mv.Repo.Migrations.AddUniqueEmailToMembers do
-  @moduledoc """
-  Updates resources based on their most recent snapshots.
-
-  This file was autogenerated with `mix ash_postgres.generate_migrations`
-  """
-
-  use Ecto.Migration
-
-  def up do
-    create unique_index(:members, [:email], name: "members_unique_email_index")
-  end
-
-  def down do
-    drop_if_exists unique_index(:members, [:email], name: "members_unique_email_index")
-  end
-end
diff --git a/priv/repo/seeds.exs b/priv/repo/seeds.exs
index 04f65a8..3ff747e 100644
--- a/priv/repo/seeds.exs
+++ b/priv/repo/seeds.exs
@@ -48,7 +48,7 @@ Accounts.create_user!(%{email: "admin@mv.local"}, upsert?: true, upsert_identity
 |> Ash.Changeset.for_update(:admin_set_password, %{password: "testpassword"})
 |> Ash.update!()
 
-# Create sample members for testing - use upsert to prevent duplicates
+# Create sample members for testing
 for member_attrs <- [
       %{
         first_name: "Hans",
@@ -90,8 +90,7 @@ for member_attrs <- [
         house_number: "8"
       }
     ] do
-  # Use upsert to prevent duplicates based on email
-  Membership.create_member!(member_attrs, upsert?: true, upsert_identity: :unique_email)
+  Membership.create_member!(member_attrs)
 end
 
 # Create additional users for user-member linking examples
@@ -146,22 +145,18 @@ linked_members = [
   }
 ]
 
-# Create the linked members - use upsert to prevent duplicates
+# Create the linked members only if the users don't already have members
 Enum.each(linked_members, fn member_attrs ->
   user = member_attrs.user
   member_attrs_without_user = Map.delete(member_attrs, :user)
 
   # Check if user already has a member
   if user.member_id == nil do
-    # User is free, create member and link - use upsert to prevent duplicates
-    Membership.create_member!(
-      Map.put(member_attrs_without_user, :user, %{id: user.id}),
-      upsert?: true,
-      upsert_identity: :unique_email
-    )
+    # User is free, create member and link
+    Membership.create_member!(Map.put(member_attrs_without_user, :user, %{id: user.id}))
   else
-    # User already has a member, just create the member without linking - use upsert to prevent duplicates
-    Membership.create_member!(member_attrs_without_user, upsert?: true, upsert_identity: :unique_email)
+    # User already has a member, just create the member without linking
+    Membership.create_member!(member_attrs_without_user)
   end
 end)
 
diff --git a/priv/resource_snapshots/repo/members/20250926180341.json b/priv/resource_snapshots/repo/members/20250926180341.json
deleted file mode 100644
index 3582051..0000000
--- a/priv/resource_snapshots/repo/members/20250926180341.json
+++ /dev/null
@@ -1,202 +0,0 @@
-{
-  "attributes": [
-    {
-      "allow_nil?": false,
-      "default": "fragment(\"uuid_generate_v7()\")",
-      "generated?": false,
-      "precision": null,
-      "primary_key?": true,
-      "references": null,
-      "scale": null,
-      "size": null,
-      "source": "id",
-      "type": "uuid"
-    },
-    {
-      "allow_nil?": false,
-      "default": "nil",
-      "generated?": false,
-      "precision": null,
-      "primary_key?": false,
-      "references": null,
-      "scale": null,
-      "size": null,
-      "source": "first_name",
-      "type": "text"
-    },
-    {
-      "allow_nil?": false,
-      "default": "nil",
-      "generated?": false,
-      "precision": null,
-      "primary_key?": false,
-      "references": null,
-      "scale": null,
-      "size": null,
-      "source": "last_name",
-      "type": "text"
-    },
-    {
-      "allow_nil?": false,
-      "default": "nil",
-      "generated?": false,
-      "precision": null,
-      "primary_key?": false,
-      "references": null,
-      "scale": null,
-      "size": null,
-      "source": "email",
-      "type": "text"
-    },
-    {
-      "allow_nil?": true,
-      "default": "nil",
-      "generated?": false,
-      "precision": null,
-      "primary_key?": false,
-      "references": null,
-      "scale": null,
-      "size": null,
-      "source": "birth_date",
-      "type": "date"
-    },
-    {
-      "allow_nil?": true,
-      "default": "nil",
-      "generated?": false,
-      "precision": null,
-      "primary_key?": false,
-      "references": null,
-      "scale": null,
-      "size": null,
-      "source": "paid",
-      "type": "boolean"
-    },
-    {
-      "allow_nil?": true,
-      "default": "nil",
-      "generated?": false,
-      "precision": null,
-      "primary_key?": false,
-      "references": null,
-      "scale": null,
-      "size": null,
-      "source": "phone_number",
-      "type": "text"
-    },
-    {
-      "allow_nil?": true,
-      "default": "nil",
-      "generated?": false,
-      "precision": null,
-      "primary_key?": false,
-      "references": null,
-      "scale": null,
-      "size": null,
-      "source": "join_date",
-      "type": "date"
-    },
-    {
-      "allow_nil?": true,
-      "default": "nil",
-      "generated?": false,
-      "precision": null,
-      "primary_key?": false,
-      "references": null,
-      "scale": null,
-      "size": null,
-      "source": "exit_date",
-      "type": "date"
-    },
-    {
-      "allow_nil?": true,
-      "default": "nil",
-      "generated?": false,
-      "precision": null,
-      "primary_key?": false,
-      "references": null,
-      "scale": null,
-      "size": null,
-      "source": "notes",
-      "type": "text"
-    },
-    {
-      "allow_nil?": true,
-      "default": "nil",
-      "generated?": false,
-      "precision": null,
-      "primary_key?": false,
-      "references": null,
-      "scale": null,
-      "size": null,
-      "source": "city",
-      "type": "text"
-    },
-    {
-      "allow_nil?": true,
-      "default": "nil",
-      "generated?": false,
-      "precision": null,
-      "primary_key?": false,
-      "references": null,
-      "scale": null,
-      "size": null,
-      "source": "street",
-      "type": "text"
-    },
-    {
-      "allow_nil?": true,
-      "default": "nil",
-      "generated?": false,
-      "precision": null,
-      "primary_key?": false,
-      "references": null,
-      "scale": null,
-      "size": null,
-      "source": "house_number",
-      "type": "text"
-    },
-    {
-      "allow_nil?": true,
-      "default": "nil",
-      "generated?": false,
-      "precision": null,
-      "primary_key?": false,
-      "references": null,
-      "scale": null,
-      "size": null,
-      "source": "postal_code",
-      "type": "text"
-    }
-  ],
-  "base_filter": null,
-  "check_constraints": [],
-  "custom_indexes": [],
-  "custom_statements": [],
-  "has_create_action": true,
-  "hash": "5F070A1E5BEE9883AE864FB5A4A5E81F487A1C57D41576C23BAC8D933005D565",
-  "identities": [
-    {
-      "all_tenants?": false,
-      "base_filter": null,
-      "index_name": "members_unique_email_index",
-      "keys": [
-        {
-          "type": "atom",
-          "value": "email"
-        }
-      ],
-      "name": "unique_email",
-      "nils_distinct?": true,
-      "where": null
-    }
-  ],
-  "multitenancy": {
-    "attribute": null,
-    "global": null,
-    "strategy": null
-  },
-  "repo": "Elixir.Mv.Repo",
-  "schema": null,
-  "table": "members"
-}
\ No newline at end of file