diff --git a/.changeset/fix-sys-user-unique-validation.md b/.changeset/fix-sys-user-unique-validation.md
new file mode 100644
index 000000000..610b7ce0b
--- /dev/null
+++ b/.changeset/fix-sys-user-unique-validation.md
@@ -0,0 +1,17 @@
+---
+'@objectstack/platform-objects': patch
+---
+
+Fix `sys_user` load failure after the validation-rule type trim (#1485)
+
+#1485 trimmed the unenforceable validation-rule types (`unique`, `async`,
+`custom`) from the `ValidationRuleSchema` discriminated union, but `sys_user`
+still declared an `email_unique` rule with `type: 'unique'`. Loading the object
+then threw a `ZodError` ("Invalid discriminator value … at validations[0].type"),
+failing `platform-objects.test.ts` and turning `main` red.
+
+The rule was redundant: `sys_user` already declares a unique index on `email`
+(`indexes: [{ fields: ['email'], unique: true }]`), and the user table is
+managed by better-auth which enforces email uniqueness at the source. Removed
+the unenforceable validation rule; uniqueness remains enforced by the index.
+No other object uses a trimmed validation type.
diff --git a/packages/platform-objects/src/identity/sys-user.object.ts b/packages/platform-objects/src/identity/sys-user.object.ts
index 380318876..1cdb327f3 100644
--- a/packages/platform-objects/src/identity/sys-user.object.ts
+++ b/packages/platform-objects/src/identity/sys-user.object.ts
@@ -439,14 +439,8 @@ export const SysUser = ObjectSchema.create({
     mru: true,
   },
 
-  validations: [
-    {
-      name: 'email_unique',
-      type: 'unique',
-      severity: 'error',
-      message: 'Email must be unique',
-      fields: ['email'],
-      caseSensitive: false,
-    },
-  ],
+  // Email uniqueness is enforced by the unique index above (and better-auth's
+  // managed user table). A declarative `unique` validation rule is intentionally
+  // not used — uniqueness needs a DB lookup, not a synchronous validation, so it
+  // is not one of the declarable validation-rule types.
 });