Make suppliers deletable.

app/Models/Incoming.php

@@ -72,7 +72,7 @@ class Incoming extends Model
      */
     public function supplier(): BelongsTo
     {
-        return $this->belongsTo(Supplier::class);
+        return $this->belongsTo(Supplier::class)->withTrashed();
     }
 
     /**

app/Models/Supplier.php

@@ -4,9 +4,12 @@ namespace App\Models;
 
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Database\Eloquent\Relations\HasMany;
+use Illuminate\Database\Eloquent\SoftDeletes;
 
 class Supplier extends Model
 {
+    use SoftDeletes;
+
     /**
      * The attributes that are mass assignable.
      *