diff --git a/app/Models/Entry.php b/app/Models/Entry.php
index 1670c02..a758368 100644
--- a/app/Models/Entry.php
+++ b/app/Models/Entry.php
@@ -121,6 +121,11 @@ class Entry extends Model
         return $this->hasOne(Seat::class);
     }
 
+    public function calculatedScores(): HasMany
+    {
+        return $this->hasMany(CalculatedScore::class);
+    }
+
     public function scopeForSeating(Builder $query): void
     {
         $query->where('for_seating', 1);
diff --git a/app/Models/ScoreSheet.php b/app/Models/ScoreSheet.php
index 01c310f..d3a1e47 100644
--- a/app/Models/ScoreSheet.php
+++ b/app/Models/ScoreSheet.php
@@ -16,6 +16,22 @@ class ScoreSheet extends Model
 
     protected $casts = ['subscores' => 'json'];
 
+    protected static function boot()
+    {
+        parent::boot();
+        static::created(function ($scoreSheet) {
+            $scoreSheet->deleteRelatedCalculatedScores();
+        });
+
+        static::updated(function ($scoreSheet) {
+            $scoreSheet->deleteRelatedCalculatedScores();
+        });
+
+        static::deleted(function ($scoreSheet) {
+            $scoreSheet->deleteRelatedCalculatedScores();
+        });
+    }
+
     public function entry(): BelongsTo
     {
         return $this->belongsTo(Entry::class);
@@ -37,9 +53,18 @@ class ScoreSheet extends Model
             'audition_id'    // Local key on the intermediate model (Entry)
         );
     }
+
     public function getSubscore($id)
     {
         return $this->subscores[$id]['score'] ?? false;
         // this function is used at resources/views/tabulation/entry_score_sheet.blade.php
     }
+
+    public function deleteRelatedCalculatedScores(): void
+    {
+        $entry = $this->entry;
+        if ($entry) {
+            $entry->calculatedScores()->delete();
+        }
+    }
 }