diff --git a/app/buck2_data/error.proto b/app/buck2_data/error.proto
index c5a7f514178a..30df0b5d9b1d 100644
--- a/app/buck2_data/error.proto
+++ b/app/buck2_data/error.proto
@@ -210,6 +210,15 @@ enum ErrorTag {
   RE_DATA_LOSS = 1315;
   RE_UNAUTHENTICATED = 1316;
 
+  // Dice Errors
+  // Value: https://fburl.com/code/5dxzaw41
+  DICE_DUPLICATED_CHANGE = 1400;
+  DICE_CHANGED_TO_INVALID = 1401;
+  DICE_INJECTED_KEY_GOT_INVALIDATION = 1402;
+  DICE_CANCELLED = 1403;
+  DICE_UNEXPECTED_CYCLE_GUARD_TYPE = 1404;
+  DICE_DUPLICATE_ACTIVATION_DATA = 1405;
+
   // Error during attribute configuration during target configuration.
   CONFIGURE_ATTR = 3001;
   // Action execution
diff --git a/app/buck2_error/src/classify.rs b/app/buck2_error/src/classify.rs
index a5967f7bcdab..7cb1db885491 100644
--- a/app/buck2_error/src/classify.rs
+++ b/app/buck2_error/src/classify.rs
@@ -117,6 +117,12 @@ pub(crate) fn category_and_rank(tag: ErrorTag) -> (Option<Tier>, u32) {
         ErrorTag::HttpServer => rank!(tier0),
         ErrorTag::StarlarkInternal => rank!(tier0),
         ErrorTag::ActionMismatchedOutputs => rank!(tier0),
+        ErrorTag::DiceDuplicatedChange => rank!(tier0),
+        ErrorTag::DiceChangedToInvalid => rank!(tier0),
+        ErrorTag::DiceInjectedKeyGotInvalidation => rank!(tier0),
+        ErrorTag::DiceCancelled => rank!(tier0),
+        ErrorTag::DiceUnexpectedCycleGuardType => rank!(tier0),
+        ErrorTag::DiceDuplicateActivationData => rank!(tier0),
 
         ErrorTag::Environment => rank!(environment),
         ErrorTag::Tier0 => rank!(tier0),
diff --git a/app/buck2_error/src/conversion/dice_error.rs b/app/buck2_error/src/conversion/dice_error.rs
index da225ec05e71..deaaae3579fb 100644
--- a/app/buck2_error/src/conversion/dice_error.rs
+++ b/app/buck2_error/src/conversion/dice_error.rs
@@ -7,10 +7,29 @@
  * of this source tree.
  */
 
+use dice_error::DiceErrorImpl;
+
+use crate::ErrorTag;
+
 impl From<dice_error::DiceError> for crate::Error {
     #[cold]
     #[track_caller]
     fn from(value: dice_error::DiceError) -> Self {
-        crate::conversion::from_any_with_tag(value, crate::ErrorTag::Tier0)
+        let error_tag = match *value.0 {
+            DiceErrorImpl::DuplicateChange(_) => ErrorTag::DiceDuplicatedChange,
+            DiceErrorImpl::ChangedToInvalid(_) => ErrorTag::DiceChangedToInvalid,
+            DiceErrorImpl::InjectedKeyGotInvalidation(_) => {
+                ErrorTag::DiceInjectedKeyGotInvalidation
+            }
+            // TODO(minglunli): Might be worth extracting the CancellationReason and create tags for those too
+            DiceErrorImpl::Cancelled(_) => ErrorTag::DiceCancelled,
+            DiceErrorImpl::UnexpectedCycleGuardType {
+                expected_type_name: _,
+                actual_type_name: _,
+            } => ErrorTag::DiceUnexpectedCycleGuardType,
+            DiceErrorImpl::DuplicateActivationData => ErrorTag::DiceDuplicateActivationData,
+        };
+
+        crate::conversion::from_any_with_tag(value, error_tag)
     }
 }