diff --git a/app/Models/Document/DocumentHistory.php b/app/Models/Document/DocumentHistory.php
index dd51b1f8c..b4ce0fef2 100644
--- a/app/Models/Document/DocumentHistory.php
+++ b/app/Models/Document/DocumentHistory.php
@@ -17,7 +17,7 @@ class DocumentHistory extends Model
 
     public function document()
     {
-        return $this->belongsTo('App\Models\Document\Document');
+        return $this->belongsTo('App\Models\Document\Document')->where('type', $this->type);
     }
 
     public function scopeType(Builder $query, string $type)
diff --git a/app/Models/Document/DocumentItem.php b/app/Models/Document/DocumentItem.php
index 8317fc1f1..0093ddda1 100644
--- a/app/Models/Document/DocumentItem.php
+++ b/app/Models/Document/DocumentItem.php
@@ -61,7 +61,7 @@ class DocumentItem extends Model
 
     public function document()
     {
-        return $this->belongsTo('App\Models\Document\Document');
+        return $this->belongsTo('App\Models\Document\Document')->where('type', $this->type);
     }
 
     public function item()
@@ -126,7 +126,7 @@ class DocumentItem extends Model
         $tax_ids = [];
 
         foreach ($this->taxes as $tax) {
-            $tax_ids[] = (string)$tax->tax_id;
+            $tax_ids[] = (string) $tax->tax_id;
         }
 
         $this->setAttribute('tax_ids', $tax_ids);
diff --git a/app/Models/Document/DocumentItemTax.php b/app/Models/Document/DocumentItemTax.php
index e71c03019..a94ba08ce 100644
--- a/app/Models/Document/DocumentItemTax.php
+++ b/app/Models/Document/DocumentItemTax.php
@@ -6,7 +6,6 @@ use App\Abstracts\Model;
 use App\Traits\Currencies;
 use Illuminate\Database\Eloquent\Builder;
 use Illuminate\Database\Eloquent\Relations\BelongsTo;
-use Znck\Eloquent\Relations\BelongsToThrough as BelongsToThroughRelation;
 use Znck\Eloquent\Traits\BelongsToThrough;
 
 class DocumentItemTax extends Model
@@ -28,7 +27,7 @@ class DocumentItemTax extends Model
 
     public function document()
     {
-        return $this->belongsTo('App\Models\Document\Document');
+        return $this->belongsTo('App\Models\Document\Document')->where('type', $this->type);
     }
 
     public function item()
diff --git a/app/Models/Document/DocumentTotal.php b/app/Models/Document/DocumentTotal.php
index 7304e83c2..51fb62513 100644
--- a/app/Models/Document/DocumentTotal.php
+++ b/app/Models/Document/DocumentTotal.php
@@ -29,7 +29,7 @@ class DocumentTotal extends Model
 
     public function document()
     {
-        return $this->belongsTo('App\Models\Document\Document');
+        return $this->belongsTo('App\Models\Document\Document')->where('type', $this->type);
     }
 
     public function scopeType(Builder $query, string $type)