diff --git a/REFERENCE.md b/REFERENCE.md
index 2951060f..526c843c 100644
--- a/REFERENCE.md
+++ b/REFERENCE.md
@@ -35,6 +35,7 @@
 * [`peadm::migration_opts_default`](#peadm--migration_opts_default)
 * [`peadm::node_manager_yaml_location`](#peadm--node_manager_yaml_location)
 * [`peadm::oid`](#peadm--oid)
+* [`peadm::pe_db_names`](#peadm--pe_db_names)
 * [`peadm::plan_step`](#peadm--plan_step)
 * [`peadm::recovery_opts_all`](#peadm--recovery_opts_all)
 * [`peadm::recovery_opts_default`](#peadm--recovery_opts_default)
@@ -823,6 +824,24 @@ Data type: `String`
 
 
 
+### <a name="peadm--pe_db_names"></a>`peadm::pe_db_names`
+
+Type: Puppet Language
+
+The peadm::pe_db_names function.
+
+#### `peadm::pe_db_names(String $pe_ver)`
+
+The peadm::pe_db_names function.
+
+Returns: `Array`
+
+##### `pe_ver`
+
+Data type: `String`
+
+
+
 ### <a name="peadm--plan_step"></a>`peadm::plan_step`
 
 Type: Ruby 4.x API
diff --git a/functions/pe_db_names.pp b/functions/pe_db_names.pp
new file mode 100644
index 00000000..bc1137ec
--- /dev/null
+++ b/functions/pe_db_names.pp
@@ -0,0 +1,33 @@
+function peadm::pe_db_names (
+  String $pe_ver,
+) >> Array {
+  $original_db_names = [
+    'pe-activity',
+    'pe-classifier',
+    'pe-inventory',
+    'pe-orchestrator',
+    'pe-rbac',
+  ]
+
+  $pe_2025_or_later = SemVerRange('>= 2025.0.0')
+  $pe_2023_8_or_later = SemVerRange('>= 2023.8.0')
+
+  case $pe_ver {
+    # The patching service was added in 2025.0.0
+    $pe_2025_or_later: {
+      $original_db_names + [
+        'pe-hac',
+        'pe-patching',
+      ]
+    }
+
+    # The host-action-collector (hac) was added in 2023.8
+    $pe_2023_8_or_later: {
+      $original_db_names + ['pe-hac']
+    }
+
+    default: {
+      $original_db_names
+    }
+  }
+}
diff --git a/plans/add_database.pp b/plans/add_database.pp
index 6219bde8..72860bba 100644
--- a/plans/add_database.pp
+++ b/plans/add_database.pp
@@ -18,6 +18,7 @@
   # Get current peadm config before making modifications and shutting down
   # PuppetDB
   $peadm_config = run_task('peadm::get_peadm_config', $primary_target).first.value
+  $pe_ver = $peadm_config['pe_version']
 
   $compilers = $peadm_config['params']['compilers']
 
@@ -41,7 +42,7 @@
     $operating_mode = $mode
     out::message("Operating mode overridden by parameter mode set to ${mode}")
   } else {
-    # If array is empty then no external databases were previously configured 
+    # If array is empty then no external databases were previously configured
     $no_external_db = peadm::flatten_compact([
         $postgresql_a_host,
         $postgresql_b_host,
@@ -87,7 +88,7 @@
 
   peadm::plan_step('init-db-node') || {
     # Install PSQL on new node to be used as external PuppetDB backend by using
-    # puppet in lieu of installer 
+    # puppet in lieu of installer
     run_plan('peadm::subplans::component_install', $postgresql_target,
       primary_host       => $primary_target,
       avail_group_letter => $avail_group_letter,
@@ -162,16 +163,10 @@
     if $operating_mode == 'init' {
       # Clean up old puppetdb database on primary and those which were copied to
       # new host.
-      $target_db_purge = [
-        'pe-activity',
-        'pe-classifier',
-        'pe-inventory',
-        'pe-orchestrator',
-        'pe-rbac',
-      ]
+      $target_db_purge = peadm::pe_db_names($pe_ver)
 
       # If a primary replica exists then pglogical is enabled and will prevent
-      # the clean up of databases on our target because it opens a connection. 
+      # the clean up of databases on our target because it opens a connection.
       if $replica_host {
         run_plan('peadm::util::db_disable_pglogical', $postgresql_target, databases => $target_db_purge)
       }