diff --git a/docker-dev/seed/seed-clusters.sql b/docker-dev/seed/seed-clusters.sql
index a4ce9d7e..0e12f0a8 100644
--- a/docker-dev/seed/seed-clusters.sql
+++ b/docker-dev/seed/seed-clusters.sql
@@ -101,97 +101,22 @@ IF NOT EXISTS (SELECT 1 FROM dbo.ClusterNode WHERE NodeId = 'site-b-2:4053')
     VALUES ('site-b-2:4053', 'SITE-B', 'site-b-2', 4840, 8081, 'urn:OtOpcUa:site-b-2', 150, 1, 'docker-dev-seed');
 
 ------------------------------------------------------------------------------
--- Galaxy MxAccess gateway — MAIN cluster
+-- Galaxy MxAccess gateway — INTENTIONALLY NOT SEEDED (retired 2026-06-15)
 --
--- Namespace.Kind=SystemPlatform is required for Galaxy/MXAccess data per
--- decision #107; raw equipment drivers use Equipment. DriverInstance points
--- at the external mxaccessgw process. The driver code lives in this repo
--- (.NET 10, cross-platform); only the gateway worker needs Windows.
+-- This block used to seed a Namespace with Kind='SystemPlatform' + a
+-- 'GalaxyMxGateway' DriverInstance + 3 mirror tags. That is now BROKEN: the
+-- 'SystemPlatform' NamespaceKind member was removed when Galaxy became a
+-- standard Equipment-kind driver (migration 20260613022355
+-- CleanupSystemPlatformNamespaces). cluster-seed runs AFTER the migrator, so
+-- re-inserting a 'SystemPlatform' row re-introduced a Kind the current code
+-- cannot EF-materialize — which 500s the /deployments page AND fails every
+-- publish (ConfigComposer reads db.Namespaces). See the cleanup migration.
 --
--- ApiKeySecretRef = env:GALAXY_MXGW_API_KEY → resolved at runtime by
--- GalaxyDriver.ResolveApiKey. The env var is set on every driver-role
--- container in docker-compose.yml.
+-- If a Galaxy fixture is needed on a fresh rig, author an EQUIPMENT-kind Galaxy
+-- driver via the UNS UI (the 'MAIN-galaxy-eq' pattern) — do NOT re-add a
+-- SystemPlatform namespace here.
 ------------------------------------------------------------------------------
 
-IF NOT EXISTS (SELECT 1 FROM dbo.Namespace WHERE NamespaceId = 'MAIN-galaxy')
-    INSERT INTO dbo.Namespace
-        (NamespaceRowId, NamespaceId, ClusterId, Kind, NamespaceUri, Enabled, Notes)
-    VALUES
-        (NEWID(), 'MAIN-galaxy', 'MAIN', 'SystemPlatform',
-         'urn:zb:docker-dev:galaxy', 1,
-         'docker-dev seed — Galaxy / MXAccess namespace served by the MAIN cluster.');
-
-IF NOT EXISTS (SELECT 1 FROM dbo.DriverInstance WHERE DriverInstanceId = 'MAIN-galaxy-mxgw')
-    INSERT INTO dbo.DriverInstance
-        (DriverInstanceRowId, DriverInstanceId, ClusterId, NamespaceId, Name, DriverType, Enabled, DriverConfig)
-    VALUES
-        (NEWID(), 'MAIN-galaxy-mxgw', 'MAIN', 'MAIN-galaxy',
-         'MxAccess gateway (10.100.0.48:5120)', 'GalaxyMxGateway', 1,
-         N'{
-  "Gateway": {
-    "Endpoint": "http://10.100.0.48:5120",
-    "ApiKeySecretRef": "env:GALAXY_MXGW_API_KEY",
-    "UseTls": false,
-    "ConnectTimeoutSeconds": 10,
-    "DefaultCallTimeoutSeconds": 30
-  },
-  "MxAccess": {
-    "ClientName": "OtOpcUa-MAIN-docker-dev",
-    "PublishingIntervalMs": 1000
-  },
-  "Repository": {
-    "DiscoverPageSize": 5000,
-    "WatchDeployEvents": true
-  },
-  "Reconnect": {
-    "InitialBackoffMs": 500,
-    "MaxBackoffMs": 30000,
-    "ReplayOnSessionLost": true
-  }
-}');
-
-------------------------------------------------------------------------------
--- Galaxy test tags — TestMachine_001.TestAlarm001..003
---
--- SystemPlatform-namespace tags have EquipmentId=NULL and use FolderPath +
--- Name to address the MXAccess item. The Galaxy driver subscribes via the
--- "FolderPath.Name" MXAccess reference form; OPC UA browse path is the
--- equivalent "FolderPath/Name" under the SystemPlatform namespace.
---
--- Idempotency: each insert is guarded on the UX_Tag_FolderPath key
--- (DriverInstanceId, FolderPath, Name WHERE EquipmentId IS NULL), NOT TagId.
--- The Galaxy driver auto-materialises these same folder-path tags at runtime
--- under its own generated TagIds, so a TagId-only guard would pass on a re-run
--- and then collide on UX_Tag_FolderPath, making cluster-seed exit 1.
-------------------------------------------------------------------------------
-
-IF NOT EXISTS (SELECT 1 FROM dbo.Tag
-               WHERE DriverInstanceId = 'MAIN-galaxy-mxgw' AND FolderPath = 'TestMachine_001'
-                 AND Name = 'TestAlarm001' AND EquipmentId IS NULL)
-    INSERT INTO dbo.Tag
-        (TagRowId, TagId, DriverInstanceId, DeviceId, EquipmentId, Name, FolderPath, DataType, AccessLevel, WriteIdempotent, PollGroupId, TagConfig)
-    VALUES
-        (NEWID(), 'MAIN-galaxy-TestMachine_001-TestAlarm001', 'MAIN-galaxy-mxgw', NULL, NULL,
-         'TestAlarm001', 'TestMachine_001', 'Boolean', 0, 0, NULL, N'{}');
-
-IF NOT EXISTS (SELECT 1 FROM dbo.Tag
-               WHERE DriverInstanceId = 'MAIN-galaxy-mxgw' AND FolderPath = 'TestMachine_001'
-                 AND Name = 'TestAlarm002' AND EquipmentId IS NULL)
-    INSERT INTO dbo.Tag
-        (TagRowId, TagId, DriverInstanceId, DeviceId, EquipmentId, Name, FolderPath, DataType, AccessLevel, WriteIdempotent, PollGroupId, TagConfig)
-    VALUES
-        (NEWID(), 'MAIN-galaxy-TestMachine_001-TestAlarm002', 'MAIN-galaxy-mxgw', NULL, NULL,
-         'TestAlarm002', 'TestMachine_001', 'Boolean', 0, 0, NULL, N'{}');
-
-IF NOT EXISTS (SELECT 1 FROM dbo.Tag
-               WHERE DriverInstanceId = 'MAIN-galaxy-mxgw' AND FolderPath = 'TestMachine_001'
-                 AND Name = 'TestAlarm003' AND EquipmentId IS NULL)
-    INSERT INTO dbo.Tag
-        (TagRowId, TagId, DriverInstanceId, DeviceId, EquipmentId, Name, FolderPath, DataType, AccessLevel, WriteIdempotent, PollGroupId, TagConfig)
-    VALUES
-        (NEWID(), 'MAIN-galaxy-TestMachine_001-TestAlarm003', 'MAIN-galaxy-mxgw', NULL, NULL,
-         'TestAlarm003', 'TestMachine_001', 'Boolean', 0, 0, NULL, N'{}');
-
 COMMIT TRANSACTION;
 
 ------------------------------------------------------------------------------