diff --git a/.fixtures.yml b/.fixtures.yml
index 59805deb..e4276a53 100644
--- a/.fixtures.yml
+++ b/.fixtures.yml
@@ -1,21 +1,23 @@
 ---
 fixtures:
   forge_modules:
-    ruby_task_helper: "puppetlabs/ruby_task_helper"
-    service: "puppetlabs/service"
-    package: "puppetlabs/package"
-    reboot: "puppetlabs/reboot"
-    inifile: "puppetlabs/inifile"
+    ruby_task_helper: puppetlabs/ruby_task_helper
+    service: puppetlabs/service
+    package: puppetlabs/package
+    reboot: puppetlabs/reboot
+    inifile: puppetlabs/inifile
   repositories:
-    facts: "https://github.com/puppetlabs/puppetlabs-facts.git"
-    puppet_agent: "https://github.com/puppetlabs/puppetlabs-puppet_agent.git"
-    provision: "https://github.com/puppetlabs/provision.git"
-    stdlib: "https://github.com/puppetlabs/puppetlabs-stdlib.git"
-    apply_helpers: "https://github.com/puppetlabs/puppetlabs-apply_helpers"
-    bolt_shim: "https://github.com/puppetlabs/puppetlabs-bolt_shim"
-    format: "https://github.com/voxpupuli/puppet-format"
-    container_inventory: "https://gitlab.com/nwops/bolt-container_inventory.git"
-    node_manager: "https://github.com/puppetlabs/puppetlabs-node_manager.git"
+    facts: https://github.com/puppetlabs/puppetlabs-facts.git
+    puppet_agent: https://github.com/puppetlabs/puppetlabs-puppet_agent.git
+    provision:
+      repo: https://github.com/puppetlabs/provision.git
+      ref: v3.0.1
+    stdlib: https://github.com/puppetlabs/puppetlabs-stdlib.git
+    apply_helpers: https://github.com/puppetlabs/puppetlabs-apply_helpers
+    bolt_shim: https://github.com/puppetlabs/puppetlabs-bolt_shim
+    format: https://github.com/voxpupuli/puppet-format
+    container_inventory: https://gitlab.com/nwops/bolt-container_inventory.git
+    node_manager: https://github.com/puppetlabs/puppetlabs-node_manager.git
   symlinks:
-    "peadm": "#{source_dir}"
-    "peadm_spec": "#{source_dir}/spec/acceptance/peadm_spec"
+    peadm: '#{source_dir}'
+    peadm_spec: '#{source_dir}/spec/acceptance/peadm_spec'
diff --git a/.github/workflows/test-migration.yaml b/.github/workflows/test-migration.yaml
index 59633b11..4ef58313 100644
--- a/.github/workflows/test-migration.yaml
+++ b/.github/workflows/test-migration.yaml
@@ -40,9 +40,9 @@ jobs:
           - standard
           - standard-with-dr
           - large
-            # - extra-large
+          - extra-large
           - large-with-dr
-            # - extra-large-with-dr
+          - extra-large-with-dr
         version: [2021.7.9, 2023.8.2, 2025.2.0]
         image: [almalinux-cloud/almalinux-8]
         include:
@@ -54,6 +54,20 @@ jobs:
             version: 2023.8.0
             image: almalinux-cloud/almalinux-8
             new_pe_version: 2025.2.0
+          - architecture: extra-large
+            version: 2023.8.0
+            image: almalinux-cloud/almalinux-8
+            new_pe_version: 2025.2.0
+         # excluding the following combinations as due to their long running nature they always fail due to 
+         # the test nodes in GCP that litmus provisions becoming unreachable after a time. If we address PE-40902
+         # to change how we provision test nodes in CI then we will hopefully be able to include these
+        exclude:
+          - architecture: extra-large-with-dr
+            version: 2023.8.2
+            image: almalinux-cloud/almalinux-8
+          - architecture: extra-large-with-dr
+            version: 2025.2.0
+            image: almalinux-cloud/almalinux-8
     steps:
       - name: Checkout Source
         uses: actions/checkout@v4
diff --git a/.github/workflows/test-upgrade-matrix.yaml b/.github/workflows/test-upgrade-matrix.yaml
index fbb718ff..b640b272 100644
--- a/.github/workflows/test-upgrade-matrix.yaml
+++ b/.github/workflows/test-upgrade-matrix.yaml
@@ -36,7 +36,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        architecture: [standard, extra-large-with-dr]
+        architecture: [standard, extra-large]  # removing xl-with dr until PE-40902 is addressed
         version: [2019.8.12, 2021.7.9, 2023.8.2]
         version_to_upgrade: [2021.7.9, 2023.8.2, 2025.2.0]
         image: [almalinux-cloud/almalinux-8]
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..8ee62749 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..7aa74cfc 100644
--- a/plans/migrate.pp
+++ b/plans/migrate.pp
@@ -8,12 +8,19 @@
 #   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 replica server to be added to the cluster
+# @param primary_postgresql_host
+#   Optional new primary PostgreSQL server to be added to the cluster
+# @param replica_postgresql_host
+#   Optional new replica PostgreSQL server to be added to the cluster
 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,
+  Optional[Peadm::SingleTargetSpec] $replica_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 +32,9 @@
 
   $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] },
+      $replica_postgresql_host ? { undef => [], default => [$replica_postgresql_host] },
   ].flatten)
   $all_hosts = peadm::flatten_compact([
       $old_primary_host,
@@ -118,10 +127,27 @@
     out::message('No nodes to purge from old configuration')
   }
 
+  # provision a postgresql host if one is provided
+  if $primary_postgresql_host {
+    run_plan('peadm::add_database', targets => $primary_postgresql_host,
+      primary_host => $new_primary_host,
+      is_migration => true,
+    )
+    # provision a replica postgresql host if one is provided
+    if $replica_postgresql_host {
+      run_plan('peadm::add_database', targets => $replica_postgresql_host,
+        primary_host => $new_primary_host,
+        is_migration => true,
+      )
+    }
+  }
+
+  # provision a replica if one is provided
   if $replica_host {
     run_plan('peadm::add_replica', {
         primary_host => $new_primary_host,
         replica_host => $replica_host,
+        replica_postgresql_host => $replica_postgresql_host,
     })
   }
 
@@ -134,6 +160,8 @@
         version                     => $upgrade_version,
         download_mode               => 'direct',
         replica_host                => $replica_host,
+        primary_postgresql_host     => $primary_postgresql_host,
+        replica_postgresql_host     => $replica_postgresql_host,
     })
   }
 }
diff --git a/spec/acceptance/peadm_spec/plans/provision_test_cluster.pp b/spec/acceptance/peadm_spec/plans/provision_test_cluster.pp
index e9b3451a..e86146a0 100644
--- a/spec/acceptance/peadm_spec/plans/provision_test_cluster.pp
+++ b/spec/acceptance/peadm_spec/plans/provision_test_cluster.pp
@@ -67,10 +67,10 @@
         ['primary', 'compiler', 'replica', 'compiler', 'new-primary', 'new-replica']
       }
       'extra-large-migration': {
-        ['primary', 'primary-pdb-postgresql', 'compiler', 'new-primary', 'new-primary-pdb-postgresql']
+        ['primary', 'primary-pdb-postgresql', 'new-primary', 'new-primary-pdb-postgresql']
       }
       'extra-large-with-dr-migration': {
-        ['primary', 'primary-pdb-postgresql', 'compiler', 'replica', 'replica-pdb-postgresql', 'compiler', 'new-primary', 'new-replica', 'new-primary-pdb-postgresql', 'new-replica-pdb-postgresql']
+        ['primary', 'primary-pdb-postgresql', 'replica', 'replica-pdb-postgresql', 'new-primary', 'new-replica', 'new-primary-pdb-postgresql', 'new-replica-pdb-postgresql']
       }
       default: {
         fail_plan("Unknown architecture: ${architecture}")
diff --git a/spec/acceptance/peadm_spec/plans/test_migration.pp b/spec/acceptance/peadm_spec/plans/test_migration.pp
index 7f17e636..33e9b3c9 100644
--- a/spec/acceptance/peadm_spec/plans/test_migration.pp
+++ b/spec/acceptance/peadm_spec/plans/test_migration.pp
@@ -30,6 +30,8 @@
     new_primary_host => $new_primary_target,
     upgrade_version => $upgrade_version,
     replica_host => $new_replica_target,
+    primary_postgresql_host => $new_primary_postgresql_target,
+    replica_postgresql_host => $new_replica_postgresql_target,
   )
 
   # run infra status on the new primary
@@ -66,9 +68,9 @@
   # if new_replica_postgresql_target is supplied then check that is in the expected place in the config
   if $new_replica_postgresql_target {
     if $peadm_config['params']['replica_postgresql_host'] == $new_replica_postgresql_target.peadm::certname() {
-      out::message("New primary postgres host ${new_replica_postgresql_target.peadm::certname()} set up correctly")
+      out::message("New replica postgres host ${new_replica_postgresql_target.peadm::certname()} set up correctly")
     } else {
-      fail_plan("New primary postgres host ${new_replica_postgresql_target.peadm::certname()} was not set up correctly")
+      fail_plan("New replica postgres host ${new_replica_postgresql_target.peadm::certname()} was not set up correctly")
     }
   }