diff --git a/.changeset/mighty-flowers-travel.md b/.changeset/mighty-flowers-travel.md
new file mode 100644
index 0000000000..e79af94d99
--- /dev/null
+++ b/.changeset/mighty-flowers-travel.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-auth-backend': minor
+---
+
+Fix user_created_at migration causing SQLiteError regarding use of non-constants for defaults
diff --git a/plugins/auth-backend/migrations/20250707164600_user_created_at.js b/plugins/auth-backend/migrations/20250707164600_user_created_at.js
index eb78cb21b0..386ff577cf 100644
--- a/plugins/auth-backend/migrations/20250707164600_user_created_at.js
+++ b/plugins/auth-backend/migrations/20250707164600_user_created_at.js
@@ -22,7 +22,19 @@
 exports.up = async function up(knex) {
   await knex.schema.alterTable('user_info', table => {
     table.renameColumn('exp', 'updated_at');
-    table.timestamp('created_at').notNullable().defaultTo(knex.fn.now());
+    table.timestamp('created_at').nullable();
+  });
+
+  await knex('user_info').update({
+    created_at: knex.fn.now(),
+  });
+
+  await knex.schema.alterTable('user_info', table => {
+    table
+      .timestamp('created_at')
+      .notNullable()
+      .defaultTo(knex.fn.now())
+      .alter();
   });
 };