diff --git a/app/Models/ElementProvider.php b/app/Models/ElementProvider.php
index 2dc27e08..d2df6271 100644
--- a/app/Models/ElementProvider.php
+++ b/app/Models/ElementProvider.php
@@ -15,6 +15,11 @@ class ElementProvider extends Model
         'name',
     ];
 
+    public function sport()
+    {
+        return $this->belongsTo(Sport::class);
+    }
+
     public function element()
     {
         return $this->belongsTo(Element::class);
diff --git a/app/Models/Event.php b/app/Models/Event.php
index eb2ad17d..26f80317 100644
--- a/app/Models/Event.php
+++ b/app/Models/Event.php
@@ -33,6 +33,11 @@ class Event extends Model
         static::addGlobalScope(new SportScope);
     }
 
+    public function provider()
+    {
+        return $this->belongsTo(Provider::class);
+    }
+
     public function sport()
     {
         return $this->belongsTo(Sport::class);
@@ -40,7 +45,7 @@ class Event extends Model
 
     public function country()
     {
-        return $this->belongsTo(Country::class, 'country_id', 'tx_id')->where('disabled', 0)->where('is_country', 1);
+        return $this->belongsTo(Country::class)->where('disabled', 0)->where('is_country', 1);
     }
 
     public function group()
diff --git a/app/Models/Group.php b/app/Models/Group.php
index 6dde480b..e82231d7 100644
--- a/app/Models/Group.php
+++ b/app/Models/Group.php
@@ -23,4 +23,9 @@ class Group extends Model
     {
         return $this->belongsTo(Sport::class);
     }
+
+    public function competition_group()
+    {
+        return $this->belongsTo(CompetitionGroup::class);
+    }
 }
diff --git a/app/Models/GroupFilter.php b/app/Models/GroupFilter.php
deleted file mode 100644
index d96e3cb0..00000000
--- a/app/Models/GroupFilter.php
+++ /dev/null
@@ -1,25 +0,0 @@
-<?php
-
-namespace App\Models;
-
-use Illuminate\Database\Eloquent\Model;
-
-class GroupFilter extends Model
-{
-    protected $fillable = [
-        'name',
-        'group_id',
-        'bkm_group_id',
-        'bookmaker_id',
-    ];
-
-    public function group()
-    {
-        return $this->belongsTo(Group::class);
-    }
-
-    public function bookmaker()
-    {
-        return $this->belongsTo(Bookmaker::class);
-    }
-}
diff --git a/app/Models/Odds3way.php b/app/Models/Odds3way.php
index 9e91c4c0..d6ffedff 100644
--- a/app/Models/Odds3way.php
+++ b/app/Models/Odds3way.php
@@ -26,6 +26,11 @@ class Odds3way extends Model
         'updated_at',
     ];
 
+    public function event()
+    {
+        return $this->belongsTo(Event::class);
+    }
+
     public function sport()
     {
         return $this->belongsTo(Sport::class);
@@ -36,11 +41,6 @@ class Odds3way extends Model
         return $this->belongsTo(Bookmaker::class, 'bookmaker_id', 'txid');
     }
 
-    public function event()
-    {
-        return $this->belongsTo(Event::class);
-    }
-
     public function provider()
     {
         return $this->belongsTo(Provider::class);
diff --git a/app/Models/Supervisor.php b/app/Models/Supervisor.php
index 2ead702e..0174a18f 100644
--- a/app/Models/Supervisor.php
+++ b/app/Models/Supervisor.php
@@ -24,16 +24,6 @@ class Supervisor extends Model
         return $this->belongsTo(Sport::class);
     }
 
-    public function bookmaker()
-    {
-        return $this->belongsTo(Bookmaker::class);
-    }
-
-    public function customer()
-    {
-        return $this->belongsTo(Customer::class);
-    }
-
     public function provider()
     {
         return $this->belongsTo(Provider::class);
diff --git a/database/migrations/2023_05_25_112700_create_events_table.php b/database/migrations/2023_05_25_112700_create_events_table.php
index a4783578..e2b96114 100644
--- a/database/migrations/2023_05_25_112700_create_events_table.php
+++ b/database/migrations/2023_05_25_112700_create_events_table.php
@@ -26,7 +26,7 @@ return new class extends Migration
             $table->dateTime('starttime')->nullable();
             $table->integer('sport_id')->index()->references('id')->on('sports');
             $table->integer('country_id')->default(0)->nullable()->index()->references('id')->on('countries');
-            $table->integer('group_id')->default(0)->nullable()->index();
+            $table->integer('group_id')->default(0)->nullable()->index()->references('id')->on('groups');
             $table->integer('competition_group_id')->default(0)->nullable()->index()->references('id')->on('competition_groups');
             $table->integer('home_id')->default(0)->nullable()->index()->references('id')->on('elements');
             $table->integer('away_id')->default(0)->nullable()->index()->references('id')->on('elements');
diff --git a/database/migrations/2025_12_14_090814_create_multiline_clients_table.php b/database/migrations/2025_12_14_090814_create_multiline_clients_table.php
index befebc04..81b59aa8 100644
--- a/database/migrations/2025_12_14_090814_create_multiline_clients_table.php
+++ b/database/migrations/2025_12_14_090814_create_multiline_clients_table.php
@@ -16,7 +16,7 @@ return new class extends Migration
             $table->integer('client_id')->default(0);
             $table->integer('sport_id')->index()->references('id')->on('sports');
             $table->boolean('disabled')->default(0);
-            $table->integer('multiline_setting_id')->default(1);
+            $table->integer('multiline_setting_id')->default(1)->references('id')->on('multiline_settings');
             $table->integer('bookmaker_id')->index()->references('id')->on('bookmakers');
             $table->integer('position')->default(0);
             $table->integer('sort')->default(0);