diff --git a/crates/rooch-framework-tests/tests/cases/account_storage/exists_and_move_from.exp b/crates/rooch-framework-tests/tests/cases/account_storage/exists_and_move_from.exp
new file mode 100644
index 000000000..45fae8392
--- /dev/null
+++ b/crates/rooch-framework-tests/tests/cases/account_storage/exists_and_move_from.exp
@@ -0,0 +1,7 @@
+processed 3 tasks
+
+task 1 'publish'. lines 3-34:
+status EXECUTED
+
+task 2 'run'. lines 36-44:
+status EXECUTED
diff --git a/crates/rooch-framework-tests/tests/cases/account_storage/exists_and_move_from.move b/crates/rooch-framework-tests/tests/cases/account_storage/exists_and_move_from.move
new file mode 100644
index 000000000..861d0a061
--- /dev/null
+++ b/crates/rooch-framework-tests/tests/cases/account_storage/exists_and_move_from.move
@@ -0,0 +1,44 @@
+//# init --addresses test=0x42
+
+//# publish
+module test::m {
+    use std::signer;
+    use moveos_std::storage_context::{StorageContext};
+    use moveos_std::account_storage;
+
+    struct Test has key{
+        addr: address,
+        version: u64
+    }
+
+    fun init(ctx: &mut StorageContext, sender: &signer) {
+        let sender_addr = signer::address_of(sender);
+        account_storage::global_move_to(ctx, sender, Test{
+            addr: sender_addr,
+            version: 0,
+        });
+    }
+
+    public fun test_exists_and_move_from(ctx: &mut StorageContext, sender:&signer){
+        let sender_addr = signer::address_of(sender);
+        let test_exists = account_storage::global_exists<Test>(ctx, sender_addr);
+        assert!(test_exists, 1);
+        let test = account_storage::global_move_from<Test>(ctx, sender_addr); 
+        let test_exists = account_storage::global_exists<Test>(ctx, sender_addr);
+        assert!(!test_exists, 2);
+        let Test{
+            addr: _,
+            version: _
+        } = test;
+    }
+}
+
+//# run --signers test
+script {
+    use moveos_std::storage_context::{StorageContext};
+    use test::m;
+
+    fun main(ctx: &mut StorageContext, sender: signer) {
+        m::test_exists_and_move_from(ctx, &sender);
+    }
+}
diff --git a/crates/rooch-framework-tests/tests/cases/account_storage/basic.exp b/crates/rooch-framework-tests/tests/cases/account_storage/module_exists.exp
similarity index 100%
rename from crates/rooch-framework-tests/tests/cases/account_storage/basic.exp
rename to crates/rooch-framework-tests/tests/cases/account_storage/module_exists.exp
diff --git a/crates/rooch-framework-tests/tests/cases/account_storage/basic.move b/crates/rooch-framework-tests/tests/cases/account_storage/module_exists.move
similarity index 100%
rename from crates/rooch-framework-tests/tests/cases/account_storage/basic.move
rename to crates/rooch-framework-tests/tests/cases/account_storage/module_exists.move
diff --git a/examples/complex_struct/sources/complex_struct.move b/examples/complex_struct/sources/complex_struct.move
index 9c87688d1..a5cea1644 100644
--- a/examples/complex_struct/sources/complex_struct.move
+++ b/examples/complex_struct/sources/complex_struct.move
@@ -107,16 +107,6 @@ module rooch_examples::complex_struct {
    fun init(ctx: &mut StorageContext, sender: signer) {
       
       let addr = signer::address_of(&sender);
-      //When we try to re publish the modules, the `ComplexStruct` already inited
-      //so we need to remove it first. 
-      //There some bugs in the global_exists| global_move_from | global_move_to
-      //Seam like the VM think the resource after move_from still exists.
-      //FIXME
-      // if (account_storage::global_exists<ComplexStruct>(ctx, addr)){
-      //    let old_struct = account_storage::global_move_from<ComplexStruct>(ctx, addr);
-      //    drop(old_struct);
-      // };
-      
       let object_id = {
          let tx_ctx = storage_context::tx_context_mut(ctx);
          tx_context::fresh_object_id(tx_ctx) 
diff --git a/moveos/moveos-stdlib/move-stdlib/doc/error.md b/moveos/moveos-stdlib/move-stdlib/doc/error.md
index 991ffee53..eb2890523 100644
--- a/moveos/moveos-stdlib/move-stdlib/doc/error.md
+++ b/moveos/moveos-stdlib/move-stdlib/doc/error.md
@@ -198,7 +198,7 @@ Construct a canonical error code from a category and a reason.
 
 
 <pre><code><b>public</b> <b>fun</b> <a href="error.md#0x1_error_canonical">canonical</a>(category: u64, reason: u64): u64 {
-  (category * 10000) + reason
+  (category &lt;&lt; 16) + reason
 }
 </code></pre>
 
diff --git a/moveos/moveos-stdlib/moveos-stdlib/sources/account_storage.move b/moveos/moveos-stdlib/moveos-stdlib/sources/account_storage.move
index 347ea3e2b..44d8ed803 100644
--- a/moveos/moveos-stdlib/moveos-stdlib/sources/account_storage.move
+++ b/moveos/moveos-stdlib/moveos-stdlib/sources/account_storage.move
@@ -354,4 +354,26 @@ module moveos_std::account_storage {
         assert!(exist_account_storage(&ctx , sender_addr), 1);
         storage_context::drop_test_context(ctx);
     }
+
+    #[test(sender=@0x42)]
+    fun test_ensure_move_from_and_exists(sender: signer){
+        let sender_addr = signer::address_of(&sender);
+        let ctx = storage_context::new_test_context(sender_addr);
+        let test_exists = global_exists<Test>(&ctx, sender_addr);
+        assert!(!test_exists, 1);
+        global_move_to(&mut ctx, &sender, Test{
+            addr: sender_addr,
+            version: 1,
+        });
+        let test_exists = global_exists<Test>(&ctx, sender_addr);
+        assert!(test_exists, 2);
+        let test = global_move_from<Test>(&mut ctx, sender_addr); 
+        let test_exists = global_exists<Test>(&ctx, sender_addr);
+        assert!(!test_exists, 3);
+        let Test{
+            addr: _,
+            version: _
+        } = test;
+        storage_context::drop_test_context(ctx);
+    }
 }
\ No newline at end of file