diff --git a/.github/workflows/test-migration.yaml b/.github/workflows/test-migration.yaml
index 59633b11..4339a002 100644
--- a/.github/workflows/test-migration.yaml
+++ b/.github/workflows/test-migration.yaml
@@ -40,7 +40,7 @@ jobs:
           - standard
           - standard-with-dr
           - large
-            # - extra-large
+          - extra-large
           - large-with-dr
             # - extra-large-with-dr
         version: [2021.7.9, 2023.8.2, 2025.2.0]
diff --git a/REFERENCE.md b/REFERENCE.md
index 38d60c1f..48d95cde 100644
--- a/REFERENCE.md
+++ b/REFERENCE.md
@@ -1804,6 +1804,7 @@ The following parameters are available in the `peadm::add_database` plan:
 * [`primary_host`](#-peadm--add_database--primary_host)
 * [`mode`](#-peadm--add_database--mode)
 * [`begin_at_step`](#-peadm--add_database--begin_at_step)
+* [`is_migration`](#-peadm--add_database--is_migration)
 
 ##### <a name="-peadm--add_database--targets"></a>`targets`
 
@@ -1843,6 +1844,14 @@ Optional[Enum[
 
 Default value: `undef`
 
+##### <a name="-peadm--add_database--is_migration"></a>`is_migration`
+
+Data type: `Optional[Boolean]`
+
+
+
+Default value: `false`
+
 ### <a name="peadm--add_replica"></a>`peadm::add_replica`
 
 Add or replace a replica host.
diff --git a/plans/add_database.pp b/plans/add_database.pp
index 72860bba..19079002 100644
--- a/plans/add_database.pp
+++ b/plans/add_database.pp
@@ -9,6 +9,7 @@
       'update-db-settings',
       'cleanup-db',
   'finalize']] $begin_at_step = undef,
+  Optional[Boolean]      $is_migration = false,
 ) {
   $primary_target = peadm::get_targets($primary_host, 1)
   $postgresql_target = peadm::get_targets($targets, 1)
@@ -22,8 +23,9 @@
 
   $compilers = $peadm_config['params']['compilers']
 
-  # Bail if this is trying to be ran against Standard
-  if $compilers.empty {
+  # Bail if this is trying to be ran against Standard. We need to allow this plan to progress for a migration 
+  # though as initially the installation will not have compilers added
+  if $compilers.empty and !$is_migration {
     fail_plan('Plan peadm::add_database is only applicable for L and XL deployments')
   }
 
@@ -59,11 +61,15 @@
 
   if $operating_mode == 'init' {
     # If no other PSQL node then match primary group letter
-    $avail_group_letter = peadm::flatten_compact($roles['server'].map |$k,$v| {
+    $calculated_group_letter = peadm::flatten_compact($roles['server'].map |$k,$v| {
         if $v == $primary_host {
           $k
         }
     })[0]
+    $avail_group_letter = $calculated_group_letter ? {
+      undef   => $is_migration ? { true => 'A', default => undef },
+      default => $calculated_group_letter,
+    }
     # Assume PuppetDB backend hosted on Primary if in init mode
     $source_db_host = $primary_host
   } else {
diff --git a/plans/migrate.pp b/plans/migrate.pp
index 108d18d8..0b24ef50 100644
--- a/plans/migrate.pp
+++ b/plans/migrate.pp
@@ -8,12 +8,17 @@
 #   The new server that will become the PE primary server
 # @param upgrade_version
 #   Optional version to upgrade to after migration is complete
+# @param replica_host
+#   Optional new server that will become the PE replica server
+# @param primary_postgresql_host
+#   Optional new server that will become the primary postgresql server
 #
 plan peadm::migrate (
   Peadm::SingleTargetSpec $old_primary_host,
   Peadm::SingleTargetSpec $new_primary_host,
   Optional[String] $upgrade_version = undef,
   Optional[Peadm::SingleTargetSpec] $replica_host = undef,
+  Optional[Peadm::SingleTargetSpec] $primary_postgresql_host = undef,
 ) {
   # pre-migration checks
   out::message('This plan is a work in progress and it is not recommended to be used until it is fully implemented and supported')
@@ -25,7 +30,8 @@
 
   $new_hosts = peadm::flatten_compact([
       $new_primary_host,
-      $replica_host ? { undef => [], default => [$replica_host] }
+      $replica_host ? { undef => [], default => [$replica_host] },
+      $primary_postgresql_host ? { undef => [], default => [$primary_postgresql_host] }
   ].flatten)
   $all_hosts = peadm::flatten_compact([
       $old_primary_host,
@@ -118,6 +124,13 @@
     out::message('No nodes to purge from old configuration')
   }
 
+  if $primary_postgresql_host {
+    run_plan('peadm::add_database', targets => $primary_postgresql_host,
+      primary_host => $new_primary_host,
+      is_migration => true,
+    )
+  }
+
   if $replica_host {
     run_plan('peadm::add_replica', {
         primary_host => $new_primary_host,
diff --git a/spec/acceptance/peadm_spec/plans/test_migration.pp b/spec/acceptance/peadm_spec/plans/test_migration.pp
index 7f17e636..ba2347ac 100644
--- a/spec/acceptance/peadm_spec/plans/test_migration.pp
+++ b/spec/acceptance/peadm_spec/plans/test_migration.pp
@@ -30,6 +30,7 @@
     new_primary_host => $new_primary_target,
     upgrade_version => $upgrade_version,
     replica_host => $new_replica_target,
+    primary_postgresql_host => $new_primary_postgresql_target,
   )
 
   # run infra status on the new primary