diff --git a/.github/workflows/update-supported-enterprise-server-versions.yml b/.github/workflows/update-supported-enterprise-server-versions.yml
index 7a5be4439..81aa36126 100644
--- a/.github/workflows/update-supported-enterprise-server-versions.yml
+++ b/.github/workflows/update-supported-enterprise-server-versions.yml
@@ -3,6 +3,7 @@ name: Update Supported Enterprise Server Versions
 on:
   schedule:
     - cron: "0 0 * * *"
+  workflow_dispatch:
 
 jobs:
   update-supported-enterprise-server-versions:
diff --git a/.github/workflows/update-supported-enterprise-server-versions/update.py b/.github/workflows/update-supported-enterprise-server-versions/update.py
index 50460256e..d09501ed2 100755
--- a/.github/workflows/update-supported-enterprise-server-versions/update.py
+++ b/.github/workflows/update-supported-enterprise-server-versions/update.py
@@ -15,6 +15,11 @@ def main():
 	api_compatibility_data = json.loads(_API_COMPATIBILITY_PATH.read_text())
 
 	releases = json.loads(_RELEASE_FILE_PATH.read_text())
+
+	# Remove GHES version using a previous version numbering scheme.
+	if "11.10.340" in releases:
+		del releases["11.10.340"]
+
 	oldest_supported_release = None
 	newest_supported_release = semver.VersionInfo.parse(api_compatibility_data["maximumVersion"] + ".0")