diff --git a/k8s/upgrade/src/common/constants.rs b/k8s/upgrade/src/common/constants.rs
index 5327f0efe..096ae0900 100644
--- a/k8s/upgrade/src/common/constants.rs
+++ b/k8s/upgrade/src/common/constants.rs
@@ -57,3 +57,6 @@ pub(crate) const TWO_DOT_SIX: &str = "2.6.0";
 
 /// Version value for 2.7.2 release.
 pub(crate) const TWO_DOT_SEVEN_DOT_TWO: &str = "2.7.2";
+
+/// Version value for 2.7.2 release.
+pub(crate) const TWO_DOT_SEVEN_DOT_THREE: &str = "2.7.3";
diff --git a/k8s/upgrade/src/helm/values.rs b/k8s/upgrade/src/helm/values.rs
index 2b0cf4de2..e97024998 100644
--- a/k8s/upgrade/src/helm/values.rs
+++ b/k8s/upgrade/src/helm/values.rs
@@ -2,7 +2,7 @@ use crate::{
     common::{
         constants::{
             KUBE_API_PAGE_SIZE, TWO_DOT_FIVE, TWO_DOT_FOUR, TWO_DOT_ONE, TWO_DOT_O_RC_ONE,
-            TWO_DOT_SEVEN_DOT_TWO, TWO_DOT_SIX, TWO_DOT_THREE,
+            TWO_DOT_SEVEN_DOT_THREE, TWO_DOT_SEVEN_DOT_TWO, TWO_DOT_SIX, TWO_DOT_THREE,
         },
         error::{
             DeserializePromtailExtraConfig, ListCrds, Result, SemverParse,
@@ -383,6 +383,17 @@ where
         )?;
     }
 
+    // Special-case values for 2.7.3.
+    let two_dot_seven_dot_three = Version::parse(TWO_DOT_SEVEN_DOT_THREE).context(SemverParse {
+        version_string: TWO_DOT_SEVEN_DOT_THREE.to_string(),
+    })?;
+    if source_version.ge(&two_dot_o_rc_zero) && source_version.lt(&two_dot_seven_dot_three) {
+        yq.delete_object(
+            YamlKey::try_from(".etcd.initialClusterState")?,
+            upgrade_values_file.path(),
+        )?;
+    }
+
     // Default options.
     // Image tag is set because the high_priority file is the user's source options file.
     // The target's image tag needs to be set for PRODUCT upgrade.