diff --git a/app/Jobs/ProcessBillDetailDataJob.php b/app/Jobs/ProcessBillDetailDataJob.php
index 0afe94e..d04ad33 100644
--- a/app/Jobs/ProcessBillDetailDataJob.php
+++ b/app/Jobs/ProcessBillDetailDataJob.php
@@ -182,14 +182,19 @@
         {
             try {
                 if (!empty($this->billDetailBatch)) {
-                    // Bulk insert/update bill details
-                    TempBillDetail::upsert(
-                        $this->billDetailBatch,
-                        ['_id'], // Unique key
-                        array_diff((new TempBillDetail())->getFillable(), ['_id']) // Update columns
-                    );
+                    // Process in smaller chunks for better memory management
+                    foreach ($this->billDetailBatch as $entry) {
+                        // Extract all stmt_entry_ids from the current chunk
+                        $entryIds = array_column($entry, '_id');
 
-                    // Reset batch after processing
+                        // Delete existing records with these IDs to avoid conflicts
+                        TempBillDetail::whereIn('_id', $entryIds)->delete();
+
+                        // Insert all records in the chunk at once
+                        TempBillDetail::insert($entry);
+                    }
+
+                    // Reset entry batch after processing
                     $this->billDetailBatch = [];
                 }
             } catch (Exception $e) {