wip

app/Filament/Company/Resources/Purchases/BillResource/Pages/EditBill.php

 
         $record = parent::handleRecordUpdate($record, $data);
 
-        if (! $record->initialTransaction) {
-            $record->createInitialTransaction();
-        } else {
-            $record->updateInitialTransaction();
-        }
+        $record->updateInitialTransaction();
 
         return $record;
     }

app/Models/Accounting/Bill.php

 
     public function updateInitialTransaction(): void
     {
-        $transaction = $this->initialTransaction;
-
-        if ($transaction) {
-            $transaction->delete();
-        }
+        $this->initialTransaction?->delete();
 
         $this->createInitialTransaction();
     }

app/Models/Accounting/Invoice.php

 
     public function updateApprovalTransaction(): void
     {
-        $transaction = $this->approvalTransaction;
-
-        if ($transaction) {
-            $transaction->delete();
-        }
+        $this->approvalTransaction?->delete();
 
         $this->createApprovalTransaction();
     }

app/Observers/BillObserver.php

 
     public function saving(Bill $bill): void
     {
-        if ($bill->isDirty('due_date') && $bill->status === BillStatus::Overdue && ! $bill->shouldBeOverdue()) {
+        if ($bill->isDirty('due_date') && $bill->status === BillStatus::Overdue && ! $bill->shouldBeOverdue() && ! $bill->hasPayments()) {
             $bill->status = BillStatus::Open;
 
             return;

app/Observers/InvoiceObserver.php

             return;
         }
 
-        if ($invoice->isDirty('due_date') && $invoice->status === InvoiceStatus::Overdue && ! $invoice->shouldBeOverdue()) {
+        if ($invoice->isDirty('due_date') && $invoice->status === InvoiceStatus::Overdue && ! $invoice->shouldBeOverdue() && ! $invoice->hasPayments()) {
             $invoice->status = $invoice->hasBeenSent() ? InvoiceStatus::Sent : InvoiceStatus::Unsent;
 
             return;