diff --git a/server/migrations/20250810173939-remove-team-name-nullable.js b/server/migrations/20250810173939-remove-team-name-nullable.js
new file mode 100644
index 0000000000..fd859f603c
--- /dev/null
+++ b/server/migrations/20250810173939-remove-team-name-nullable.js
@@ -0,0 +1,23 @@
+"use strict";
+
+/** @type {import('sequelize-cli').Migration} */
+module.exports = {
+  async up(queryInterface, Sequelize) {
+    // Update any NULL team names to "Wiki" before removing nullable constraint
+    await queryInterface.sequelize.query(
+      `UPDATE teams SET name = 'Wiki' WHERE name IS NULL;`
+    );
+
+    await queryInterface.changeColumn("teams", "name", {
+      type: Sequelize.STRING,
+      allowNull: false,
+    });
+  },
+
+  async down(queryInterface, Sequelize) {
+    await queryInterface.changeColumn("teams", "name", {
+      type: Sequelize.STRING,
+      allowNull: true,
+    });
+  },
+};
diff --git a/server/routes/api/teams/teams.test.ts b/server/routes/api/teams/teams.test.ts
index 44c7f3d992..4e42b77fe2 100644
--- a/server/routes/api/teams/teams.test.ts
+++ b/server/routes/api/teams/teams.test.ts
@@ -225,6 +225,17 @@ describe("#team.update", () => {
     expect(res.status).toEqual(401);
   });
 
+  it("should not allow setting team name to null", async () => {
+    const admin = await buildAdmin();
+    const res = await server.post("/api/team.update", {
+      body: {
+        token: admin.getJwtToken(),
+        name: null,
+      },
+    });
+    expect(res.status).toEqual(400);
+  });
+
   it("should update default collection", async () => {
     const team = await buildTeam();
     const admin = await buildAdmin({ teamId: team.id });