diff --git a/ARCHITECTURE_PROMPT.md b/ARCHITECTURE_PROMPT.md
deleted file mode 100644
index 7dbe625..0000000
--- a/ARCHITECTURE_PROMPT.md
+++ /dev/null
@@ -1,216 +0,0 @@
-Create a Contao 5.7 bundle (PHP 8.4)
-
-Vendor: MummertMedia
-Bundle: EventManagerBundle
-Composer name: mummert-media/eventmanager-bundle
-Type: contao-bundle
-
-This bundle is internal only.
-
-IMPORTANT:
-Only implement backend functionality.
-No frontend logic.
-No controllers.
-No services.
-No access logic.
-No event listeners.
-No future planning.
-Only backend entities and relations.
-
-====================================================
-GOAL
-====================================================
-
-Extend Contao backend with:
-
-1) New entity: tl_organization named Organisationen, just german translation
-2) New entity: tl_location named Veranstaltungsorte, just german translation
-3) Join table: tl_member_organization
-4) Join table: tl_calendar_events_organization
-5) Extend tl_calendar_events with:
-   - location_id (exactly one location) with dropdown in Backend (title ASC)
-   - organization assignment (multiple via join table)
-6) Extend tl_member so that:
-   - A member can belong to multiple organizations
-7) Extend tl_organization so that:
-   - Multiple members can be assigned to it
-
-Everything manageable via Contao backend only.
-
-====================================================
-DATABASE TABLES
-====================================================
-
-Use Contao DCA SQL definitions (DBAL 4 compatible).
-Do NOT use serialized fields.
-Do NOT use string length values like "255".
-Use integer values.
-
-------------------------------------
-tl_organization + add german translation
-------------------------------------
-
-id int unsigned auto_increment
-pid int unsigned default 0
-tstamp int unsigned default 0
-dateAdded int unsigned default 0
-title varchar(255)
-alias varchar(128)
-logo binary(16) nullable
-street varchar(255)
-street2 varchar(255)
-postal varchar(255)
-city varchar(255)
-state varchar(255)
-country varchar(2)
-phone varchar(64)
-email varchar(255)
-website varchar(255)
-lat decimal(10,8)
-lng decimal(11,8)
-description text nullable
-published char(1)
-isExternal char(1)
-type varchar(32)
-
-------------------------------------
-tl_location + add german translation
-------------------------------------
-
-id int unsigned auto_increment
-tstamp int unsigned default 0
-dateAdded int unsigned default 0
-title varchar(255)
-alias varchar(128)
-description text nullable
-street varchar(255)
-street2 varchar(255)
-postal varchar(255)
-city varchar(255)
-state varchar(255)
-country varchar(2) default 'de'
-lat decimal(10,8)
-lng decimal(11,8)
-image binary(16) nullable
-published char(1)
-
-------------------------------------
-tl_member_organization
-------------------------------------
-
-id int unsigned auto_increment
-tstamp int unsigned default 0
-member_id int unsigned
-organization_id int unsigned
-
-------------------------------------
-tl_calendar_events_organization
-------------------------------------
-
-id int unsigned auto_increment
-tstamp int unsigned default 0
-event_id int unsigned
-organization_id int unsigned
-
-====================================================
-DCA REQUIREMENTS
-====================================================
-
-1) tl_organization:
-   - Backend list view
-   - Editable fields
-   - Published toggle
-   - Alias field
-   - Type as select field with static options:
-     accommodation, shopping, culture
-   - Add multi-relation field for members
-     (store relation in tl_member_organization)
-
-2) tl_location:
-   - Backend list view
-   - Editable fields
-   - Published toggle
-   - Alias field
-
-3) tl_calendar_events:
-   - Add field location_id (select, mandatory)
-     foreignKey: tl_location.title
-   - Add multi-organization relation
-     (store relation in tl_calendar_events_organization)
-
-4) tl_member:
-   - Add multi-organization relation
-     (store relation in tl_member_organization)
-
-====================================================
-RELATION HANDLING
-====================================================
-
-Use proper many-to-many handling via join tables.
-Use relation definitions in DCA.
-Do NOT use serialized arrays.
-Do NOT store IDs as comma-separated strings.
-
-====================================================
-BACKEND INTEGRATION
-====================================================
-
-Register backend modules for:
-
-- Organisationen
-- Veranstaltungsorte
-
-Under backend group content
-
-
-Use standard Contao backend module registration.
-
-====================================================
-PROJECT STRUCTURE
-====================================================
-
-Generate:
-
-src/
-  MummertMediaEventManagerBundle.php
-  DependencyInjection/
-    MummertMediaEventManagerExtension.php
-  Contao/
-    Manager/
-      Plugin.php
-
-contao/
-  dca/
-    tl_organization.php
-    tl_location.php
-    tl_member.php
-    tl_calendar_events.php
-  config/
-    config.php
-
-config/
-  services.yaml
-
-composer.json
-
-====================================================
-QUALITY RULES
-====================================================
-
-- declare(strict_types=1);
-- PHP 8.4
-- DBAL 4 compatible SQL
-- no deprecated Contao 4 syntax
-- no frontend logic
-- no controllers
-- no services
-- no placeholders
-- complete working DCA
-- ready to install via path repository
-
-====================================================
-OUTPUT
-====================================================
-
-Generate full file contents for all required files.
-Code must be production-ready.
\ No newline at end of file
diff --git a/composer.json b/composer.json
index d04cf61..0b2acc9 100644
--- a/composer.json
+++ b/composer.json
@@ -9,7 +9,7 @@
     "eventmanager"
   ],
   "require": {
-    "php": "^8.4",
+    "php": "^8.3",
     "contao/core-bundle": "^5.7",
     "contao/manager-plugin": "^2.0"
   },